I have a little different opinion. We go every President's week from MA.
What we do is arrive on the Wed. night before the week. Kids go to school that day and miss Thurs and Friday. Thurs. we do MK and Friday we do AK or MGM. Then we relax over the weekend...outlet shop, downtown Disney, etc.
On Mon or Tuesday we do Epcot and and then whatever other park we want that week. MK is usually a zoo that week, but Epcot is so big that it is easier to do.
We also rely on touringplans.com to decide what park to do what day. If MK has early entry on that Thurs, we will go there Friday and whatever park they have listed as the lightest crowd that day instead.
We have also been able to swim EVERY year....including last year when it was 50 degrees! We stay at Bonnet Creek and the pools were well over 80. Kids had a blast.
If you can plan your trip to start before the holiday or end after the holiday, it will make all the difference in the world. Just think outside the box....if EMH is one day, maybe go the day after since everyone thinks they have to go that dY. Those days the parks are crowded from opening. If you are there at rope drop on another day, you usually get a few hours in before the crowds build.
We have been going for the past 10 plus years and truly have never had a problem with the crowds.
Hope this helps!!!