You can expect it to be very busy. This will be our third time at WDW during President's week and it has been very crowded each time - not quite as crowded as it gets during Easter week though.
Hi--
I don't know if you've been before, but this will be our 3rd Pres Week in 3 years, too. It is nothing like the bone crushing crowds for July 4th (never been at Christmas or Easter), but extra planning will definitely make you happier, and make for a better trip for everyone. I think the standby of getting to the parks early and getting out by 1 or 2 ish is the best advice. Then come back later after a swim or nap or long lunch--after the afternoon parade. It's the middle of the day madness that makes everyone cranky. Last year, we were in Tomorrowland, about to brave Buzz Lightyear, when we gave up our Fast Passes-- just too crazy to deal with. We are fans of extra magic hour(and fans of naps ). Maybe we'll see you there-- we'll have our DIS nametags on!