Sorry man. My friend has had a few treestand stolen, one just this weekend. The only thing I can say if you haven't already tried this, try butting a chain around your treestand or maybe a one of those bike locks. Also try putting your initials on the bottom of the treestand. Carv them in with a key or something. I say this because one time a friend of mine put his intials on his treestand and he had it stolen from him on state land and when he went back he saw that it had been stolen. So he was walking around looking for a place to sit and saw a treestand that looked like his so he climbed up it and looked on the bottom and sure enough there was his initials.