As everyone else has also mentioned, it's YOUR spot and therefor YOU make the rules and codes of conduct to follow on YOUR tract.

My friends and I do the same thing with our properties we own and manage. It seems each of us have slightly different twistsand our own set of rules but the end result is all about doing as you're asked and being invited back again. For instance on one buddies property he has a 130" minimum, on another it's a 3 1/2 year old minimum. On my own property last year I simply told them one thing,.... "IF you kill a buck he better be big enough for the taxidermist because I'm driving!" For a $550 taxidermy bill I knew there wouldn't be much of a chance that anyone would drop the bowstring on a yearling buck, that's for sure!