I was originally planning a 3 day trip with DN (4) but after a lot of research I've decided to go for 5 days. We plan to spend a day at Epcot, a day at AK, a day at MGM (Hollywood Studios) and two days at MK. We're going the 3rd week of October. By cutting out hopping (I think I'll be lucky to get through one park a day with a 4 y.o.) and the water park option it really wasn't that much more expensive to add the extra two days on to our trip. I'd rather take the extra days and take our time doing and seeing everything than feel like we missed something.