My security box has a spot for small screws and also the camera strap can go thru it and around the tree. You don't have to lag it to the tree(some on here will whine if you do) but use small screws to position it then use the Python lock and you are good to go.
For me it's flash on as I would hate to miss a nightime shot or if you have a no flash cam its all good. try some apples, honey, mineral block to enhance your chances