The most important thing for me to do is play the wind.I tried a bottle of "essesence of fall"last year,not sure if it really helped,but I did see alot of deer.
I will put my hunting cloths in a bag of cedar as soon as i am finished hunting.
Your right,early season can be a scorcher,and sweating on stand is not good.The wife is going to buy me a bottle of carbon shield and fall blend cloths and boot spray.
I also wash my cloths in baking soda and let them hang dry outside.