We are a family of 5 with 3 adults and 2 kids (both girls). We are in the parks most of the day and evening with an afternoon break for 2-3 hrs to swim and freshen up as we usually go in the summer.
We have done POR and Allstar Music family suite (cheaper than Art of Animation). I think it depends on the ages and gender of the children. At either resort 2 of the kids would have to share a bed. Our thoughts on these two options and how they worked for us:
POR - 2 queen beds and fold down with one bathroom - 7 y/o slept very comfortable on the fold down bed and 5y/o shared a queen bed with her mom. space was tight but okay for a week. we just had to stay organized. The resort also has boat to DTD but it can be a lot of walking if you are not in a preferred location as it is a large resort. POR is our favorite resort and we love staying on property in the "Disney bubble" even if we have to sacrifice space to do so. It's not for everyone but it works for us.
AS Music - separate queen bedroom with a door, 2 bathrooms and small kitchenette. living room has fold out beds, a double, full twin and one a little smaller than a twin. We tried this resort for a longer trip for more space. my adult dd said the double bed was okay but not as comfortable as the beds at POR. The extra space and bathroom was nice. We never used the kitchenette as we were on the deluxe dining plan. the family suites are preferred location at no extra cost. The cost was only a little more than POR. (there is a thread about the AS family suites on the resorts board that has great pictures of the room and layout if you are interested)
Congrats and enjoy your "familymoon".