If I head up this Friday morning early, is there a good chance to get a good campsite?

There is a good chance you will find a site! I go there a couple times a season and ive never been turned away because the campground was full. If it is tho there are other campgrounds near by that you can fall back on

I honestly doubt it but you never know. We went Thursday morning in the thunder storm and snagged the last few spots.