When we stayed there I really wish we'd gotten a room near the lobby. We were at the very end of the hallway and it was seriously like a ten minute walk. We DID request "lower floor near the lobby" but we got the exact opposite, so I guess this really isn't helpful advice.
If you have to go back and forth between Kidani and Jambo, sometimes it's faster to walk instead of waiting for a bus. The beverage station at The Mara is so much better than the one in the gift shop at Kidani, so we went over there to refill our refillable mugs whenever practical. We had our car, so we would just stop there on our way to or from the parks.
There were a LOT of activities that looked really fun, but Luke wasn't old enough to enjoy them yet.