If dropping below 6500 or so to sleep, I seems the studies suggest you shouldn't have a problem. The problem is if you come from sea level, ascend fast (24-48 hrs) and stay above 9000 ft for sleep and activity. You may not get it, but are at higher risk then. I'd suggest acetazolamide (diamox).
Hunt high, sleep low. This is another good strategy to mitigate the effects of elevation sickness. Of course if you're having to hike up 3000 feet every morning to hunt, that can make things more challenging.
