I've shot a lot of game. Mostly deer with a few black bear and moose thrown in. Recently most of my effort has been toward coyote. Regardless, I feel that control of your scent is best accomplished by knowing the wind direction and hunting into the prevailing breeze. I don't mean to say that you should neglect all effort regarding your scent, I always keep my hunting clothes in a heavy plastic bag with pine and fir boughs thrown in. I never hunt in leather work boots that hold every scent that you come in contact with and always wear clean rubber boots. I don't wash or bath in perfumed soaps. Common sense will get you more game than you might think.

Very good answer from Liberty and I agree. If you are bow hunting and need to get close, controlling your scent is the primary concern. Staying downwind is critical but you can't always do this depending on conditions and where the deer come from. If you are shooting a rifle, you can afford to be a little less vigilant because you can shoot something from several hundred yards away. Hogs have great sense of smell and you should try to stay downwind of them. Their eyesight is not so good. The critical difference from deer is that if you are on the ground they may attack and try to kill you. Mature bucks occassionally do stupid things but normally are extremely scent conscious. That is how they get mature.

Freak
I don't know if you can fool a deers nose. I don't think that you can. I will admit openly that I'm not familiar with a lot of the scent control products that are out there. I can give you a good example of the nose of wildlife. I love to hunt coyote and sometime when I'm hunting alone I'll mix up a spray bomb. Fox and skunk urine, doe pee etc. I'll spray this stuff around if there is a good chance for a coyote. Occasionally they will come in and hesitate while scenting the air. That's all you get, a momentary hesitation, and they will scent you through all of the confusion and are quickly gone. I believe that a deer nose is better!

In my early years of hunting I followed the "expert" advice quite a bit and bought the latest gadgets etc. that almost guaranteed success. On several wilderness hunting trips I noticed similiar things the questioner did. Some of the older guys seldom bathed,chain-smoked, were loud etc. but also filled their tags. I now realize they used the wind properly, knew the area well, knew their prey and could shoot well, in other words, experience. Personally I think you could sanitize yourself to smell like a spruce tree but if the wind is wrong your breath will give you away to the dumbest prey.