Lots of folks in warmer parts of the country have never had the chance to let a deer age properly and swear it does no good anyway. Butchers and processors often say it doesn't do any good either because the meat is not marbled like a cow but I've decided that line is used simply because they don't want your deer hanging in their cooler for a week before they cut it up and get their money.
I've been aging my deer meat for years and I'm convinced it makes a SIGNIFICANT difference. Just today I cut up a doe that I shot last Sunday. Starting that day, we had a cold front move in and the temp that night was in the 20's. Monday only got up into the upper 30's. Perfect! Monday night was again in the upper 20's but the daytime high on Tuesday was forcast to be about 50. At 5am Tuesday before leaving for work, I wrapped the hanging deer in two tarps to insulate it for the day. Tuesday night was only down into the low to mid 30's which was still okay. In conditions like those, I'd leave that deer hang for a week. Getting a little below freezing at night and up into the high 40's in the day is about perfect if the hide is left on. Deer meat is slow to freeze until it gets down to the low 20's for several hours and slow to warm up with the hide on. Especially if wrapped and hung in the shade.
I have a breezeway between the shed and the house that is perfect for this.
Wednesday it was getting warmer so after work I skinned the deer, quartered it and cut the backstraps out and packed it all in a cooler with about 30 lbs of ice. Didn't open the lid until today. The ice was melted but everything was still real cold. Cut it all up and have about 15 pounds of meat in the smoker right now for jerky. Made chicken fried steaks today for lunch and they were absolutely fantastic. Honestly some of the best I've ever eaten regardless of being deer or beef. They were so good in fact that the kids wanted the same thing for supper!
If a fella had the extra room in his garage, it'd sure be nice to pick up an old refrigerator with the wire racks and put a drain pan in the bottom. It would be easy to age your meat either on the shelves or by taking the shelves out and hanging from hooks. The temp could be set perfectly and a fella could be confident things were under control. I don't have that option but I'm comfortable with doing it the way I just described.
Works for me!