I bought a Master Lock "Python" at Lowe's over the summer and have used it all season and really like it. - I move hang on's around throughout the season. The key stays in when you unlock it, so it won't fall to the ground. As someone says earlier, if they want it, they'll get it. I figure a guy has to go to a locked stand at least twice to steal it. The first time he merely stumbles upon it. A second time with equipment to climb and cut the lock. That takes guts/stupidity. Here's the link on the Master Lock site, hope this all works out for you.

http://www.masterlock.com/cgi-bin/product_detail.pl?dir=/residential/outdoor/&displaynav=&sub_cat_id=D8418C&templat e=style