I have stayed at the Sheraton Vistana Resort in a 2 bedroom villa - it sleeps 8.....2 in the master bedroom (king bed), 4 in the 2nd bedroom (2 doubles) and 2 on the sofa sleeper in the living room. There is a full kitchen, dining room, washer and dryer facilities, and whirlpool tub in master bedroom. There is plenty of things to do around the grounds---7 pools, miniture golf, play areas, and when I was there on Wednesday (I think) they had something set up at the store with a moon-bounce, funnell cake, hot dogs/hamburgers, face painting, raffles, and other things for kids to do.
They have tons of scheduled activities every day too (for adults and kids). I believe they have 3 restaurants on site too.
I would highly recommend staying here. Hope this helps!