If you aren't going to try and get everyone in one room because your husband doesn't want to be close to your mom, then I would get 2 rooms at whatever resort has the theme that appeals to you the most.
I think that not wanting to be "Too Close" may result in 2 rooms at a Value Resprt. if that doesn;t work consider the Cabins at Fort Wilderness Campground. There is a bedroom with one doulbe bed and a set of Bunk Beds in the separate bedroom. The Living Room has a (comfortable) double Murphy Bed. Could Mom and Kids have the bedroom and you and DH have the Murphy bed? This might be the solution.
You could also look into the family suites at ASMu or the junior suites at CS. The one bedrooms at the DVC resorts would also give you a bit more privacy. You will get a tiny kitchen area at ASMu or in the DVC locations.