I have read that aging is more effective with fatty meat like beef than with lean meat like venison, but I have found that aging a week or so does improve the taste. Down south, unless you have access to a walk-in cooler it's rare to have cool enough temps for hanging outside. A few years back I shot a late-season buck in January that was worn out from the rut, with almost no fat. I hung him for about two weeks in the hide under a cedar tree for shade, and it was better than average, with a distinctly different flavor. When I shoot one in warmer weather, I skin it and cool the meat ASAP, then quarter it, remove the backstraps, and put it in a cooler on top of ice. I tilt the cooler and leave it outside with the drain open so that no water accumulates. I judge when to process the meat by the odor.