I belive most KOAs are three night minimums on holiday weekends. We ran into that issue when traveling to yellowstone a couple of years ago. We were on our way home over the 4th of july and we only needed single night sites, we were out of luck there. And the few state parks I looked at had two night minimums for all the summer weekends. Makes it difficult when you are not there for the festivities being offered at the campground and are on a schedule to get home.
We have been to the Jellystone at Luray. It is good, we liked it but it was packed. Kids really liked it. They may also have three night minimums on holiday, other jellystones do.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting