We always drive down and arrive at our resort (Pop) around 1pm or so on a Saturday, so we always tend to head to DTD for the rest of that first day before returning to Pop to get a good night's sleep. The next day, our first full day, is always spent entirely at the MK. We usually end visiting Epcot the second full day, followed by DAK, and then finally DHS last. We try to avoid the park that is having the EMH's that day though, so don't necessarily stick to that same order every trip. All of our trips are 10 days in length and we always get the Park Hopper option and the Water Parks and more option, so we tend to throw the water parks in on the days that look to be the hottest and then near the end of our trip. I do love having the Park Hopper option though, as we rarely spend a full day in DAK or DHS and usually end up going back to MK or Epcot for the evening those days.