Unfortunately, the
DDP really does tend to work better for those of us that are planners (for instance I knew in April where I wanted to eat in January)
Things to keep in mind here:
You can use your TS credit for any meal of the day.
You can split them in various ways.
Not everyone has to be together to use your credits.
For 9 people, and 5 of them being children, I'd suggest some character buffets. Some people will argue that buffets aren't a good use of a TS credit but I think they'll work in your benefit. You'll have lots of choices of food, everyone can get as much as they want, and the characters will come right to your table. It's a nice way to get some of the characters "out of the way", rather than having to line up for them. I believe every park has at least one character dining option and most of those are buffets (there are exceptions though)
Checking out menus will help you as well, Allears.net has them up, and update them pretty regularly. I'd suggest a planning session with the adults in your group so you can go over any possible issues (allergies, this one hates fish but loves Chinese food while another may love steak but won't touch anything deemed exotic) If you have any picky eaters, there's definitely some places that cater to a sort of..basic spectrum of palates rather than one that's more focused on a particular cuisine. Almost all Disney restaurants have a kid's menu and those tend to be of the burger, chicken tender, mac and cheese variety. To my knowledge, anyone who is a child according to the DDP must order off the children's menu, while some adults have had luck ordering off the children's menu, but getting and paying for an adult sized portion.
Another thing that you'll want to think about is timing. For instance, if you want to see say...Fantasmic, you'll need to plan your meals around that, eating before or after. Also consider if you want to stay in the parks to eat, or if you're willing to travel to one of the resorts for your meal. Some people may find it a hassle to leave the park to go to a resort to eat then go back to the park, while others find it a welcome break. Depending on how old the kids are, they may put up a fuss leaving the parks to go eat, or they could really need (not that they know it) a break from all the stimulation. If you have that planning session with the adults, find out when everyone likes to eat. Some folks need their dinner at 5 while others are more flexible.
Don't be afraid to split up either, you don't need to have every single meal together. You may find yourself in a position where People A B D E F want to go to one place really badly while People C G H I have their heart set on another place.
Some places I would suggest to you:
Animal Kingdom-
Tusker House- this is a lunch/dinner buffet with some different choices for the adults and adventurous kiddies, but also has a kids section (and adults may choose items from that section)
Hollywood Studios-
50's Prime Time- this place is great if you don't mind a little mischief. The theme is a 1950's kitchen, your servers are your long lost relatives and the food is very homestyle. Some people are a little put off by this place because the servers will act like your mom, telling you not to put your elbows on the tables and whatnot, and sometimes will even "punish" you (make sure you eat all your veggies or no dessert!)
Sci Fi DriveIn- another themed place, this time an old drive in theater playing sci fi and horror movies reels from way back when. A nice generalized menu, and the kids may enjoy the theming. You eat in booths that look like cars, but they all face a large movie screen so it's not the greatest place for conversation. Some people also complain that it's rather dark inside.
Epcot:
Coral Reef- this is heavily seafood themed, but does have some landlubber selections. It's a nice choice if only because you can see into the large fish tanks and watch the fish while you eat. Seats next to the tank aren't always available, but you can see the tank from pretty much anywhere in the restaurant.
Garden Grill- This is at the Land pavillion, and is actually a very slowly rotating restaurant. This is another pretty homestyle place, and is served family style. This is also a character meal (I believe Chip, Dale, Mickey and Pluto come around)
Akershus- this place is very popular because its a Princess character dining location. The food is Scandinavian themed but again, there's a kids section.
Magic Kingdom:
Crystal Palace- another character buffet here, this time it's Winnie the Pooh, Eeyore, Piglet and Tigger. Very pretty inside and decent food.
Liberty Tree Tavern-- this is another meal that's served family style, and leans almost towards thanksgiving dinner.
Plaza Restaurant- lots of choices here, but it is mostly sandwiches. Could be a nice change of pace.
If you're feeling like you want to go outside of the parks I'll cover some of those too.
At the Beach Club, we have Cape May Cafe. It's another buffet, seafood themed but lots of other options here.
At the Contemporary, there's Chef Mickeys. This is totally kids themed (although I've known some adults that go here without the kiddies *ahem*) This is another buffet, and is a character dining location. You can expect to find Mickey Minnie Goofy Pluto and Donald (probably not all at once but some combination of these guys) here, and it has a pretty wide selection of food.
At the Grand Floridian, there's 2 options, but very different from each other. One is 1900 Park Faire. This is a buffet and another character dining location, featuring Cinderella, Prince Charming, Lady Tremaine, Anastasia and Drizella although I saw Alice and the Mad Hatter at breakfast (it's been a couple years since I've been there though). The other option here is the Grand Floridian Cafe, there's a nice menu that's pretty standard and of course a kids menu. This one is a little quieter but you may like a chance to relax.
Last one is at the Wilderness Lodge, and is called Whispering Canyon Cafe. This place is almost cowboy themed, and even features wooden horse rides for the little ones. Smallish menu, but again some pretty simple things here, and an all you care to enjoy skillet that gives you a nice pick of things.
Hopefully that helps somewhat. I really tried to focus on places that just about anyone should be able to find something at. Maybe who your traveling with is really into Japanese food, or even English cuisine..and there are certainly options for you there, but hopefully you can at least make a little dent in your decision making from this.