Best to avoid popular tourist spots on weekends and holidays.
Go in Sunday evening, leave on Thursday. Stay off-grid for the weekend.
X2. Everyone camps for a different reason.
However we don't camp much anymore.....just use the trailer on one or two trips a year now . The grand kids and now great grand kids like to come out on our 40 acres so I set the trailer up and hook the water/electric/sewer up.
We started camping in the late '50s about the time we married, just to get away from it all/enjoy nature and fish. Were both knocking on 80 years old so we burned out some years back. The last time we made a 3500 mile 3 week trip (2009 most campgrounds resembled dog kennels.