First time we went, we spent 1/2 day. Second time, we got there at 9 am and left at 3 pm. Last time, we spent the entire day there!! Next time, we are going to spend at least 1 1/2 days there. AK is turning into our second favorite park, after MK. I would allocate a full day there, especially if you're not planning on going back anytime soon. There is so much to see, and you can do it at a leisurely pace, which is a welcome relief.