I think I see the problem. Some are suggesting plastic chain to help.
But HOW are you going to DRAG any vehicle to the lake with a plastic chain??? :p
LOL.
We had trouble with people parking on our access road during various hunting seasons (private property). Obviously can't find anyone and it's very unlikely to catch them as they exit the woods.
I did meet an unhappy hunter not too long ago, though. He was looking for the owner of the TRACTOR parked across the road.
I hear from him every hunting season now, BEFORE he comes by and parks in the spot we set aside for him. We share a cup o' joe.
Not everything has to be a knock-down-drag-out fight, but some things do require a little effort to "set it straight" ;)