The Wild Africa Trek at Animal Kingdom is awesome. They take you back way thru the safari in a special vehicle. You get strapped in and watch them feed hippos right at the edge of a cliff looking down at their pool then you walk across a broken bridge over the savanna and and other guests riding by in their vehicles. The tour ends at the lookout on the savanna with food and drink. They take tons of photos and give you a link and you can download them. The time you get in the vehicle they answer a lot of questions and stop often close to animals for some time with the guide to answer questions and close up photos
We have done both Bay Lake/Seven Seas Lagoon and Crescent Lake. We prefer Bay Lake by far. We were picked up at Grand Floridian for Bay Lake and Yacht Club for Crescent Lake. I believe they pick up at most of the deluxe marinas, I am not sure about Fort Wilderness.