Can't help you on any local info, but if you're not used to hiking or walking at elevation, start doing interval training now. High intensity intervals, even if you use a bandana or dust mask to up your oxygen transfer efficiency by restriction will make the work at altitude much easier. Often it isn't the pursuit of game that gets you at altitude, it's getting the taken game out. I had to drag out a 220lb mule deer for my severely overweight uncle (5'8" 275lbs) this last year because he was ready to pass out after only 100 yards as he's a truck driver and doesn't get much cardio. I don't believe he could have done it at all on his own. If you're unfamiliar with interval training, YouTube it. Use an elliptical, or bicycle, or pool, or whatever, but I'm a firm believer in its benefits, especially since I used it to prep for many 100+ mile bike rides and hills, along with stamina training.