Here's a crazy idea that might work. One month before your hunt (you'll have already been training) go donate blood. Take a two day break and drink lots of water and get plenty of protein (the american diet doesn't really need extra, just make sure its good quality **eggs**) After the two days resume training, 1. your body will have less RBC to carry oxygen (somewhat simulating less available oxygen) AND 2. you'll body will kick in the erithropoetin (sp) hormone responsible for RBC production. You should be back up to regular blood volume in a months time but still be producing erithrpoetin. (You body slowly turns on the "valve" to "epo" production which is why it takes a while for you to acclimate)

Idunno, may be just the ticket and It can't hurt you, study's show that only MAX excertion (sp?) is effected after two weeks.