I too struggle with this issue. I hang mine, but have screwed up an opportunity doing that. I did see this on Ebay:
http://cgi.ebay.com/High-Point-Crossbow-Holder_W0QQitemZ220149179451QQihZ012QQcategoryZ525 08QQrdZ1QQssPageNameZWD1VQQtrksidZp1638.m118.l1247 QQcmdZViewItem
I may try this next year, but hanging is so much lighter for my climber.