I don't use a processor any more, for all the reasons mentioned above. Over the years I have really worked to get the quality of my venison up a notch. Here's some conclusions I've reached (which doesn't mean it's right, just means this is what I think):
Chill fast. It's a rare day when I don't have the hide off within an hour of dropping a deer. During bow season I don't hunt without a cooler full of ice, and if I get lucky I skin, cut up and every full freezer bag goes right into a cooler full of ice. With a little luck, that deer is packed in ice 2 hours after it went down.
I can't tell a difference from aging. I'll hang for a day or two if it's cold enough (under 40, not much below freezing at night) but I can't tell a difference if it's hung 2 hours, 2 days or 2 weeks. Prime aged beef is good stuff, but unless you have the right temp and low humidity, you can't duplicate the process for aging beef. At least, I can't.
Moisture is a flavor killer, anyway it's used. I remove any hair after skinning with dry paper towels. I wipe out the abdominal cavity with a dry paper towel. No soaking. No hanging in the rain. No wet towels. Moisture is a pathway for contamination.
I don't try to wipe away anything that's not blood. I trim away anything that has made contact with anything else.
All traces of fat have to be removed. Deer fat is full of "off" flavors for some reason. One of the reasons I like to hang a couple of days is to chill completely so that fat will come off easily.
Connective tissue a little less so, and I don't try to remove every little trace. Separating muscle groups is a good way to get at it a little quicker, but I just don't take the time. Except for backstraps and tenderloin, all my venison goes into a grinder anyway.
I believe that most 'gamey' venison is a direct result of improper handling, and most of that is related to failing to get a complete chill (under 40) on the meat quickly. What do you think a nice $40 rib roast would taste like if you left it laying around for half a day at 70 degrees? Probably taste a little gamey.
I really enjoy sausage making. I put up smoked summer sausage, breakfast sausage and Italian sausage and it is as safe as anything you can buy at Publix and tastes better than most of it, too. I just try to think "70 pound Rib Roast, $9.00 a pound" from the minute the deer hits the ground until the last bag goes in the freezer.