Like the others, we went for a quick trip a few years ago and ended up adding on there a few times..
Activities for the kids:
Similar to a cruise, there is a weekly itinary that is publish listing activities for kids and adults... There's pool games, bubbles on the boardwalk, arts & crafts, 2DC (at least I think its still there), SnorkelEARS, mini golf, Unbirthday parties, astronomy, Unca Banjo, etc...
Characters:
There is usually a character breakfast on Saturday mornings I believe in Shutters... There also may be one on Wednesday during the summer... (Can't remember).. Goofy & Max are at the character b'fast..
Cars:
You will need a car... We have both driven down and also flown down and rented a car from the airport... There are other options, towncars, limos, even Mears... But they are all more expensive then a simple rental... You will also want a car to do anything offsite like Captain Hiram's, grocery shopping, Hale's Orange Grove, etc..
Restaurants:
There are three sitdown restaurants, and one counter service by the pool...
Shutter's is the more casual of the three... Family friendly...
Sonya's... More upscale, but still caters to kids...
Green Cabin Room.. No really a restaurant, but they offer great hamburgers during lunch with views of the ocean..
Counter service by the pool... Pretty much the standard you get at any of the other
DVC resorts... (Though they offer a great "sandpail" lunch for the kids..)
Airports:
There are three airports... Orlando (MCO), West Palm Beach, or Melbourne... While Melbourne is the closest, it is still about a 45 minute drive. Melbourne is also smaller and has few rental car choices...
We always fly into MCO.. We know the airport because of all of our WDW trips, and there are more choices for rental cars. It is about a 90 minute drive from MCO to VB..
Hope this helps!