I"m not sure of the hours in Nov. When my son's friend stayed overnight w/us, both parks were open until 10pm. And he had the fotl roomkey advantage. You could look at the US and IOA websites to see what attractions they have and then decide whether or not to do both parks. Personally, I think there are "not to be missed" things in both parks, and for only $20some more you can go back and forth between the 2 parks all day if you wanted. Also, I don't think it's that crowded in Nov. until Thanksgiving.