I must be the only AK hater on this board! DFi and I have been going since they opened it and I just can't stand this park. It gets ridiculously hot no matter what time of year because all the foliage is close together, plus mixed with all the people it just seems even hotter with overcrowding. When we go, we typically just spend half a day there because it's not worth it to spend the whole day. When we went in February, we were there for two hours - long enough to eat lunch and DFi and DB rode EE once.
If you're only going to pick 3 parks, then do the majors - MGM, MK and Epcot. Although, you could probably spend 1/2 day or a few hours in AK and still have plenty of time to do MGM that afternoon/evening.
As always, YMMV, but it's really my least favorite park.