School is back in session. Things are going to slow down up there until winter.
I went there on a weekday, granted it was in the morning, and Iwas able to visit the sites and choose the one that I like. While you are going there later, school just started and that may or may not affect the crowd. When I was there (the Wednesday right before the week of July 4th), there were still spaces when the sun was setting, but obviously my word is not a guarantee that you would find a spot. Good luck and have fun!
It might be possible but do not wait any longer plus don't be picky with what's available. Bring a writing utensil so you can fill out your form for your cash drop off
Thanks! Your answer is awaiting moderation.