Maybe you should just have a limited number? Maybe the team's best 8 deer. Forget about showing a tag and the measuring of the rack. Should be based on total number of points and a doe would count as maybe 8 points. That way a buck bigger than an 8 pointer would be worth more than a doe.
Anyway, I'm sure that somehow this could be made simple. We are on the honor system . . .but, the measuring might get a bit testy unless the picture is taken with a tape measure.

Figure out an easy point system with some kind of tie breaker, they'll most likely be a tie. A cool tie-breaker would be best rack in the tying groups and let the forum vote.