We like knowing we have a reservation so we don't waste a 500 mile drive. In the past month we RV'd to RZR riding destinations. We were in Marysvale, Utah and the RV parks in the town were full. We next went to Silverton, CO and all their parks were full as was the boon-docking in the nearby Nat'l Forest. 
On the way home we spent the night in Albuquerque, NM and the campground was almost empty thanks to NM being locked down. BTW, Utah and Colorado weren't locked down and business was booming.
Glad we had reservations. You gotta have reservations these days.