another thing to think about is boots. I have a pair of Vasque Breeze boots that, even though gortex, do breathe well and are not fully enclosed leather like other boots. This makes a difference and pack some Gold Bond Blue foot powder, life saver.
I bought a set corefour baselayer merino woolfrom ccamofire for the first time and wore it for three and four days straight on my spring bear hunts in the Hells Canyuon area (big and steep = lots of sweating) and never did smell it in the baselayer but I could smell myself when I took them off to dry during spotting sessions. GOOOOD STUFF and I will be buying more.
Just wear a loin cloth. It is very breathable especially when you get a nice breeze going. I don't know if you will be able to find one in camo though.