Polynesian, all the way. Our very first Disney trip in 2014 was to AoA with 3 kids, while the themed rooms along with a separate bedroom/bathroom for the adults, Poly just feels better in all aspects. The volcano pool, splash ground for your 6 year old, food options, proximity to the TTC and ease of access to MK make it the best choice for experience. If I were you, I would try to rent DVC points and stay in a DVC studio. They have a full bath plus a second bath-ish as well call it with a sink and shower. It is one of our favorite resorts if not our most favorite.