Visiting camgrounds

Here in Washington you do have to pay a day use fee of $5 or $10 to enter a State Park. They also offer an annual Discover Pass for $30 or $35 (I'm old & can't remember) which gives you a mirror hanger that gives you 12 month access to any State Park. Of course camping fees are extra and if you are paying camping fees, you don't need a pass to enter. I'm surprised other states don't offer this as an option.

With private parks, I can see a reluctance to let anyone and everyone to just come in and drive around. With the daring of today's thieves, it is a risk I wouldn't want to assume.