I learned by necessity. During bow season it can be warm even here in Minnesota. And alot of buthcers aren't open on Sunday's unless it is rifle season. So for the best results, I skin my deer immediately upon recovery, and away I go. I'm no pro, however get the back straps, and some steaks. The balance I freeze and take in well after Rifle Season for Grinding. I find you can get your own trimmings back after the Rush.
I have also seen too many "DEER" that I wouldn't want mixed in with my clean meat by dropping off at the Butcher.
It takes me a while, but the wife kinda enjoys helping out.