According to Deb's site, President's Day weekend is one of the most crowded times of the year. The fourth of July doesn't even make the list of busiest times.
Pewing - you'll be fine because you'll be out of there before the weekend hits. That Friday, the 13th, is when it will start picking up, and you couldn't pay me to be there on Saturday and Sunday - JMHO
You should have a good time - we're actually be there too on the 8th - just planning a quick weekend trip, as we did pull the kids out of school for the first week in December this year. The beginning of February is my absolute favorite time to go - we tried early December this year because I wanted to see the Christmas decorations, but I like early February better - in my opinion, it's less crowded than even that first week in December.
Have a good time!