I would vote for SSR because of the college age guests. I am not sure a THV would work for your party as the third bedroom has only bunkbeds that are too small for many adults. Although the college kids could sleep in the living room and the child and infant in the bunkbed room (infant in a pack 'n play), child on lower bunk. But with that many guests, I would suggest a resort that has three bathrooms in a 2BR and that would AKV-Kidani or BLT. BLT or VGF (split bathroom) might be a nice choice because with the monorail you are easily connected to the Poly (which is also walking distance from VGF), BLT and VGF. Also WL is a boat ride away from BLT or MK.
I wouldn't recommend staying at VWL right now due to the construction of the quiet pool near VWL and the beach and lake front construction of buildings (restaurant and lake side cabins).