RE: High Elevation Archery Elk Hunting
check em when you get out there, I didn't notice any change, the change is so small I'd say that you wouldn't notice.
Wilderness Athlete makes some altitude supplements designed to help you aclimate more quickly, I tried them and did do better in the mtns than I expected to.
Everything I read on the subject is some people just are better than others, most are probably avg, but some are amazing, some terrible, I think I tend to fall in the latter category when talking altitude.