RE: ..How long should you keep head in freezer?
The ears can definatlely be a problem. I freind of mine shot a nice 8 pointer and kept it in the freezer for a year and a half before he decided to have my brother in law mount it recently for him. The ears were so frostbitten that the hair on the inside fell out and the hitde turned black. The taxidermist did what he could and airbrushed the insides of the ears as well as he could. All in all, it came out good, but that was pushing it. The nose also lost some of its skin due to frost bite.