I also take a baby aspirin and a Tums each morning starting a couple days before I go out. Try to spend a couple days if possible hunting up and back down at an easy pace. Then go for it. First year out we camped at 10,000 ft;. the first night. I was winded some but my friend had sinus pressures that made his teeth ache. After a couple days and some sinus meds he was okay.I live at 800 feet and we now camp at 7000 and hike/hunt to 10-11000 feet.

There are no bad days hunting elk, some are just better.