As hard as I train before a hunt, I don' t usually catch my " wind" until about the 3rd day in the mountains. Sounds like you are going to get there soon enough to get to that point before opening day. I also have problems with altitude sickness. I will tell you the things that have helped me in that regard besides getting in shape.

If at all possible get a hotel/camp at lower elevation the day you arrive and don' t do anything really strenous. I have trouble following this becuse I want to BE THERE.

Avoid caffeine at least until you are adjusted.

Drink twice as much water as you think you need.

Take one of the over the counter antacids (Rolaids, etc.) with you. Taking 2-4 tablets 3 times daily for the first few days has been shown to help prevent/treat altitude sickness. Your body tends to create more acid byproducts while it is getting used to the altitude.

If you want to be really sure, talk to your doctor and get him to prescribe Diamox (acetazolamide) to have on hand in case the other things don' t work. I have to take this to keep my symptoms to a level I can hardly notice. Be warned, this is a diruretic (makes you pee more) and it makes any carbonated drink taste AWFULL. I take this at home the day before I leave, the day of travel and 2 days after I get there.

Also, I know a lot of people who get their drinking water from a " spring" and drink it without any treatment and have never had any problem. I also know of people who have tried this and got Giardia (hikers diarrhea). Not something I ever want to get. I recommend taking a filter pump.

Good hunting