I am continually suprised at the number of people who refuse to camp over holidays. I have to admit, I was worried the first few times, but after camping on all the major summer holidays for five years (in State Parks, no less!) we have had exactly zero problems with sites or traffic or crowds. I had one issue with someone squatting on our site when we arrived late on Columbus Day two years ago because they did't check the reserve list on the kiosk board on the way in, but that was simple ignorance on their part and they kindly moved to another site so we could have ours, which was reserved for over 8 months. Maybe we've just been lucky so far.