He He, yes, I have a couple of tough ones. Would you like a hard climb, or a hard to locate? I have them all.
I have 5 series type caches, a set of 3, set of around 12, and a set of 10, and more. The latest are my 'Quacker' series. I had to rebuild a road; fill in really deep ruts with rocks, cut trees and bushes, like that. The Quacker series has 2 high caches, and are spread out in a canyon, you have to cross about 6 washes 20 or more feet deep. Coyotes live back there, Big Horn Rams, and a few thousand Rattlesnakes.
I think you will enjoy them, I had fun designing and placing them. Have you gone to Groundspeak and looked me up? OzzOzz..
(No fair going back and looking at my pictures of caches...