I'm not a long time owner, but I returned from my 5 day solo trip 3 weeks ago, so I have a little experience. While I was at the world, I stayed at SSR and OKW, with a reservation at Sanaa. I must say that the bus ride to AKV from DTD was extremely long. It seemed to be about double the time it took to get from SSR to MK, which was the second longest bus ride I took during this trip. This may have been just an illusion, because I was worried about missing a dinner reservation, but that's how it seemed.
SSR isn't super accessible either, but it's a little more in the thick of it with a 10 minute ride to Epcot, 10-15 to HS, and 20 to MK.
If you want to see the animals, you can go to AKV and walk onto the Savanna viewing area. I went onto the one next to the Sanaa check in area. They hand out nightvision camaras (free) and you can spend as much time as you want out there. They have African "guides" who will talk to you about the animals and about home. I prefer short rides (motion sickness), so I'd go with SSR. The way I see AKV is that it's a great place to go and forget that you are at Disney. There is so much to do just in/around those two buildings.