The only problem I see with this is if you see "the monster" 10 minutes into the season and you can't take him cause you haven't killed a doe yet. I would change it to having to take a doe (or 2 does depending on the buck/doe ratio) the previous year to be able to get a buck tag for the coming season. This would allow hunters to be able to kill a buck every year as long as they took a doe the previous year.