A campground I frequent (at a very busy Tourist area)the checkout time is 11 AM SHARP, not 11.01 but 11.00.
They have Security detail which rides golf carts checking EACH site.
One year we specifically asked the campground management if it was OK to leave a bit later.. They said yes it was fine but let me tell you Deputy Dog on the golf cart WAS NOT "amused" or "bending" the rules. Gave me 10 minutes to finish hooking up and vacate the campsite..
That campground also does have "overflow" area, but it is not for dropping off your trailer and site seeing. It is used only when the campgrounds are full and folks are late LEAVING at their checkout time.
My suggestion is if you don't want to leave at the checkout time on Sunday then PAY for SUNDAY NIGHT and leave later after the checkout time AT YOUR LEISURE. It is the only way to ensure you are not hassled..
As far as dropping your trailer anywhere in public.. I would NEVER, EVER consider doing that. A very good chance you will not find it when you return.
