First of all, join
AAA so you can get their discount!
My kids will be 10, 8 and 6 when we go this August. I agonized over the choice of resorts for ages. I had pretty much decided on the Family Suite at All Star Music-- it's a great value for the money.
My other prime contender was one of the beds with a Trundle at POR. Take a look there and do the math-- the pool looks amazing!
But also do the math for the cheapest room at the Contemporary. With the AAA discount, it wasn't THAT much more than my other options. And there's the HUGE consideration that the Magic Kingdom is a monorail ride or even a WALK away!!! (imagine your youngest child, in 90 degree heat, overtired and hungry. Now imagine a 10 minute walk to a pool or a nap.)That's what we eventually booked, to my delight.
When we got the elusive PIN code for 40% off, we upgraded and still saved money. Had the pin not come in the mail, I would have been thrilled with our arrangements at the Contemporary.
I say hit the reservations site, get the numbers for all the options (even at this year's prices; at least it will give you a ballpark idea) then see what your gut tells you.