Not sure what days I will be there, most likey the first public day before it gets extremely crowded.
Although I haven't done so for a few years, I believe you can dry camp there reasonably. I have done so in the past. Check their website.
This advice or opinion is worth what you paid for it!
1992 - 1983 Fleetwood Jamboree Rally class C
1995 - 1995 Holiday Rambler Endevor LE class A
2000 - 2000 Custom Monaco Windsor class A
2003 - 1997 Blue Bird Wanderlodge WB 43 class A
2016 - 2016 Forest River Forester 2801 QSF class C