If you have a bunch of "stuff" for your "hunting hobby" sell some of it on eBay, CL or a swap meet. Give about 1/2 of it back to the Mrs. She'll have no idea what it is worth, you do though.
It sounds like she can squeeze 11cents out of a dime, so she'll appreciate you selling your "crap" that probably burns her butt more than just a little bit anyway, but she indulges you cuz you bring home the bacon.
Then start shopping around for more "stuff" that you can sell at a profit. As an example, a widow is selling her hubby's gun collection out in the middle of the state somewhere. You travel 2 or 3 hours show up and make a nice offer on the whole lot, and offer to take his hunting stuff, ammo, clothes, knives you name it, off her hands as well. She'll be happy to get rid of it to someone who'll appreciate it and give a good deal to someone that needs the break (I work for the state, my wife is a stay at home mom, you know, the big sad story you just told here, wanh wanh).
My guess is that the Mrs won't care if you work your ass off (time wise) to make $100. So you part with a couple of the items on the way home at a reasonable price and show/give 1/2 to the Mrs along with showing her all the other stuff you now have to sell. The key is keeping her off your back and making a tiny bit of profit to "show & share" and "hiding" (spending) the rest (maybe even on the ride home).
If you're gone in the woods for hours on end, my guess is she is willing to give you a ton of time, and if you now have $$ for her and the kids, as a result, instead of 'spending it on your ridiculous hobby' (If she only knew -- hehe) you'll now be her hero too ! Now you get to hunt even more and maybe with some cool new shit and get some pussy !!
You may be used to paying retail, but now you have a purpose -- you HAVE to make a profit, negotiate man !!! Can you tell I'm a consultant ?! I take paypal btw feel free to make a donation.