@Region Philbis,
A bunch of us (I refuse to take sole responsibility) did this at a public campground our Scout troop was staying at. The WOMEN/MEN signs were removable.
We waited until both 'sides' were occupado then switched them.
Hilarious~~~ (we were twelve)
Our only mistake was hovering too near in order to see what would ensue.
A guy came out of the Women's side, looked across the picnic tables and spotted us immediately. We scattered like scalded dogs, but he caught up to two weenies who gave us up faster than Liver for Lent.
Scoutmaster Clint made us apologize to the guy, then made a big speech about Scout's Honor.
Joe(but there was this little glint of silly in his eye the whole time he was speaking.)Nation