I like to put mine anywhere from 18"-24", at that height you get alot more of the leg action which helps to trigger the camera. I've got mine over a carcass as we speak, im very anxious to get it on friday. make sure to keep the camera scent free, with a carcass cam you're likely to get some bears (if you have them in your area), and ive had bears do a number on my cameras before, a wipe down with scent away is always a safe bet. good luck, and be sure to post those pictures up when you get some!