I am planning on visiting 9/2 arriving pm - 9/10 leaving pm we are thinking 5 day park hoppers and maybe water park options. We are 9 people including kids what would be your plan to get the max out of your trip I've been once on a wish trip for my daughter but this time its on our own dime so we want to enjoy to the max without over doing it of course. Our kids are 2 of them just under 3 and a 7 and 8 yr old we are staying value
Here are my key things to planning:
1. If you're going to actually use early morning hours (and I mean get there at rope drop for them and not 10 minute before regular opening), I'd plan some mornings to take advantage of them when you can get a lot done. This is especially true in Magic Kingdom where with the kids that age you can take great advantage of getting on a number of fantasyland rides. If you do not realistically think you'll get up early enough, plan your park days to avoid the park with EMH.
2. Note that the Halloween party will have started during your dates which means MK will close at 7pm a number of days and therefore your opportunity to see the fireworks will be limited. If you ARE NOT going to the halloween party, be sure to schedule one evening at MK on a non-party day to see the evening entertainment. (Note that I'd avoid going to MK for the full day on a non-party day as it tends to be pretty crowded because everyone wants to do the same thing.) So I'd personally go to another park during the day and hop to MK at night knowing it'll be crowded but you're going to do a couple rides, dinner, and the parade/fireworks). On the other hand, going to MK during the day on a party day and hopping elsewhere at 4pm when the party goers start to stream in is a great plan!)
3. Figure out how many table service meals you want to do and make a few reservations based on what park you'll be at that day.
4. The only other main thing to plan in advance is FP. Read the threads if you're not already up to speed on best attractions to use FP on (which could vary based on your group with kids). Crowds will have dropped off significantly during your trip so there will be good afternoon FP availability as 4th and later FP. I would use my initial FP during the late morning (not in early morning as waits are pretty good during the first hour) and early afternoon. I usually made my first FP from 10-11 and did it later in the window when stand by times really started building. The only exception would be if you have your heart set on doing one of the 4-5 attractions with little chance of add'l FP (Anna/Elsa, Mine Train, Test Track, Soarin, etc) and you have no other good time choices. Then you may want to go to one park for a few hours using standby and saving your FP for your afternoon park. There is no right answer for this, it depends on how you set your schedule over the trip.
Last thing - make sure you understand Rider Swap if you'll want to do height restricted rides. Lots of threads on that but depending on what big rides the adults or older kids want to do, you can save time using that effectively. (Note that the swap passes are good for other days so if some adults are going to get some adult time in the park such as with kids being watched by grandparents or something else, you can save the swap passes and use them then. We did that alot when we had our au pair with us - we'd save the passes so the kids weren't waiting as much and then did our turn when they were back at the hotel later.)
You'll find lots of other tips. You're going at a great time and crowds should be very manageable. You should be able to easily do everything you want in 5 days without killing yourself. You'll also have time to just take in stuff so don't skip some of the entertainment at Epcot, the shows at AK, etc. (My 6 year olds just got into Sorcerors of Magic Kingdom which they loved and was easy to do just while touring MK).
Hope some of this helps.