Depends on what you want to accomplish.If you plan on only hitting the highlights or certain things , absolutely.If you plan on doing all the rides and all the shows, not likely.early December is low crowds, however over at the studios alot of the attractions are on the longer side ( Disaster is almost 25 mins and that is without waiting in line at all).The Shows in the off season often run on abbreviated schedules and often at the same time, so trying to get them all in on one day is hard nevermind trying to get them all in a half day.