If you have kids, be sure to print out the 99cent kids meal coupons before you go.
http://www.rainforestcafe.com/rewardsCalendars.asp
We ate at the RFC at AK. It was fine and what we expected from a chain restaurant. You can enter the restaurant from AK or from the parking lot. I have heard a tip that if it is crowded at the main AK turnstiles, to cut thru the RFC gift shop to enter the park. There is still a bag check and a turnstile w/a CM there but most people wouldn't think to do it.