With Covid affecting RV travel, it might be harder to just wing it in some places. We have in the past made reservations for the 1st leg of a trip where we have a destination. After that we wing it on the way home. Never had an issue finding places to stay. In fact last year we stayed at an RV park we would've never stayed at had we not been just meandering back home.
Oregon's CG's are almost all reservation inclusive. Makes it hard to just show up on any given day as most are no walk ins allowed. That and most all are full everyday so finding a spot large enough is also harder.
Hopefully when this Covid things over in Nov we can get back to normal.;)