I would not be in favor of trading your gun Tag for an archery tag and here's why.
You already have a some folks that only gun hunt. I've heard it a dozen times " you bow hunters get the whole rut and shoot most of the good bucks!" (We know this isn't true, but some think that)
So if you allow a second archery tag... you are going to get more bucks shot by a bow. I can see this making enough gun hunters mad enough to start pushing to move gun season so they have a "fair shot". I don't want to fight that battle. So, I'm of the mindset to not upset the apple cart.....