We've stayed at both OKW and AKL (well AKV- Kidani) and loved both. We didn't have noise issues at either one. One thing to consider about OKW is that there are only elevators in one of the buildings, so chances are if you are on an upper level floor, you'll be walking up stairs. That can be an issue with little ones and all of their stuff. We had a car at OKW, so we didn't use the buses much. There is a CS restaurant, but it only has outside seating.
We loved AKV and didn't find the lack of CS to be a problem, although we were in a 2 bedroom and had a full kitchen. At AKL- Jambo, Mara is a great CS restaurant, and even at AKV-Kidani, they bring in breakfast sandwiches you can purchase and they have lots of grocery supplies as well. We found the bus service at AKV to be excellent.
SSR is our home resort (where we own
DVC), but we have yet to stay there in the main buildings. We stayed in a THV once and used the SSR pools, and the kids loved them (but our kids are older). SSR does have a CS restaurant that has indoor seating. Again we had a car on that trip.
Really I think they are all excellent resorts. OKW and SSR require more outdoor walking, but that shouldn't be an issue in January unless you hit a really cold spell. The animals at AKL/AKV give it a step up from other resorts. We didn't have a savanna room, but there were plenty of places to see the animals. The TS restaurants there are excellent. Good luck with your decision!