I think it needs to be a trail by trail kind of decision. (who and how the decision is made is another whole bag of worms). Some trails because of terrain and construction can handle bikes and more. Some can't. Here in the NE, lots of trails are pretty wet and drainage is lacking and bikes or ATVs would ( and sometimes do really trash them.)
For along time we have had trails that are ok for snow machine, but closed to other motorized traffic and we have dealt with it.
One thing that's hard to accept is that by limiting some access, you have back country that's beyond the reach of some (many) individuals.
From a hunting perspective its a bigger deal where the game is bigger than deer. I can carry a boned out whitetail for miles, but a elk or moose is a different story.
