RE: Doing more harm than good??
It just isn't fun for me anymoreto hunt when it's hot like that. Between the sweating and the bugs it pretty much isn't worth it to me personally although I have killed deer in the heat. When I experience hot days during the season, I'll hunt the early morning period, then call it a day and do something else productive. That way I still get my hunting fix but remain fresh for late October and early November when I want to be in my stand every possible moment.
My good hunting buddy burnt himself out so bad two years ago hitting the early season real hard that by the time prime time showed up, he was just about out of gas while I was cranking right along.