I made a modified version of the Big Carl pack hanger, as seen at dutchware.com. For those that haven't seen one, it's a 6-foot piece of Zing-it with a locked brummel at one end and a Dutch ti hook at the other. It's wrapped around a tree and then run through your pack's haul loop and back up with the dutch hook hooked over the line. Your pack then conveniently hangs from the tree.
I replaced the Dutch hook with a Dutch fleaz. The fleaz also has a hook, but I can then pull the line up as needed and snug it under the fleaz "wing". This makes it easier to adjust the pack height.
I used the Fleaz rather than the hook because I had a spare one, but I like the adjustability it gives.