How did I miss this? You sound exactly like my dad. That is by far the best way to live. If I ever make it to that age I plan on having the exact same mindset. You can't really get old if you're always a child. Keeps life interesting that way too.
Bugs, It might be a good idea to get your 20 yrs in the Army and then become a wildlife biologist. Collect 2 retirements.
And I might add that having military experience gives you a huge leg up in applying for federal jobs. You get what are called preference points and are therefore shifted to the top of the list pretty quickly, given that you have the same degrees as everyone else. Most of the federal agencies employ wildlife biologists... NPS, USGS, USFS etc and also ones you wouldn't normally think of such as the DOD. The Department of Defense might also be an awesome choice for someone that is coming out of the military anyways. And two retirements doesn't sound that bad either I guess.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...