I don't believe Disney will let you book more than 2 people in a King-bedded room, so you'd be stuck with the 2 fulls at a moderate. When we're in this situation, my DH & I each just take our own bed, and our 2 DS's 6 & 9 bunk down on the floor in sleeping bags. It's like camping out for them, and they have fun with it. We do this even if there are 2 queens - when you're used to a king, nothing else will do!