We always visit Busch Gardens on our trips, and will be doing so again next May. Its maybe not too brilliant for really young children, I cant remember my eldest going on that much when we were there last time (she would have been 3&1/2), but she did enjoy seeing the animals etc, which I think it is better than Animal Kingdom for. She will be 5 and a bit next trip, so there should be plenty for her to do.
Ive always found it not too bad to get to, its only really about 4 turns from the 192 (although with obvious long stretches inbetween, hehe).
Last time we went I took my PDA with TomTom on it, to see if It told me any alternative ways home, but the damn thing crashed on me and my wife wasnt too impressed with me trying to get it working again whilst driving, so it got put away. Now I have the newer version (5) and on my phone, Its a lot more stable, so I'll have another go at that next year.