Flying out and will have 3 adults all three kids in tow for our first trip to WDW. DD8, DS6, DD4. Will be going March 2014, sometime around the last week I think. Was looking at Kidani AKV because I think the kids will love the animals. Our home is GCV so the WL isn't anything special. I'm hoping to get a 2BR.
This going to be a hard time to get a 7 months?
Any other resorts I should be considering for the best kids experience?
Wondering, does everyone just take the buses, or do people do a rental car? (IE those whom want to sneak over to HP world).
This going to be a hard time to get a 7 months?
Any other resorts I should be considering for the best kids experience?
Wondering, does everyone just take the buses, or do people do a rental car? (IE those whom want to sneak over to HP world).

) All but the oldest of your kids are probably a bit young/small for most of the "thrill" rides at IoA - especially the Harry Potter ride ... 
As a DLR vet, I'd recommend getting a car if you're going to stay at AKV. We found the buses to be ... limiting and frustrating given how spoiled we are at VGC, accustomed to just walking into the park. We got a car for the second half of our last trip, and we liked it so much better, not waiting for buses or going on somebody else's schedule, that we're getting a car for the entire trip this year. It might be cheaper to take a shuttle from Disney World to Universal, I believe there are several companies including Mears that has them, but the convenience of having a car inside Disney World itself is just wonderful.
. Others don't mind dealing with the teams in the parking lots and traffic on the roads...so it depends on how much you relax vs how impatient you are 