Tusker House is IMO the best character meal on property. The food is AMAZING, don't forget to try the cheese blintzes, they are to die for.
My only advice is this: if your reservation is for before the park opens, or slightly after, get there before 8:30 A.M. Not like, on the bus getting off at the stop "there", at the rope asking to go through for your reservation "there." I've been burned twice in a row with 8:40 a.m reservations and not being able to get through the rope due to the opening show they do at the Animal Kingdom. They won't let anyone through the rope after a certain time until after the little show is over. It causes people to be late for their reservations all the time.