Oh, if you use trash cans, steel instead of plastic. Most rats I know cannot chew through galvanized steel and raccoons still haven't figured out how to take a bungee cord off a stash can.
X-RAY DAVE mentions something very important, allies and friends. If a friend doesn't mind you keeping your gear at his place you may have a win-win situation. You have your stuff, he gets your muscle once in awhile.