I'm getting a little swamped on my offer.. lol
I will to try to get back to you folks best I can. I will share some knowledge and help everyone out the best I can. Unit 22 is a hard unit because of all the private land and most of the BLM you see on the maps is hard to access.
Drill a small hole though each horn on the back for a small nail. Boil/simmer the whole head with the horns submerged to right below prongs for about 30 minutes. Using gloves or oven mits hold up head by horns a twist/pull. Horns should pop right off. Throw whole head back in pot to finish...
OP asked about terrain mostly and altitude. Pretty benign questions.... It is a rough and rocky hunt for sure and the altitude is a little harsh on the lungs the first few days. It even kicks my rear early on.