Ark,
I can not stress this enough, once something like this happens, then it is not going to stop. It is not just about firearms but other things too.
This bill, is not about trucking, it is not about protection of cargo or one's self while on the road, it is about allowing the common citizen who is "qualified" to carry to go across state lines. It removes the rights of the state to regulate what someone can bring into the state. If Michigan wants to have a reciprocating agreement with Ohio, then the process is there for them to pursue getting an agreement in place, the feds need to stay out of the process completely.
You all can't have it both ways, either you want to limit federal powers, or you don't - this is not a gray area.
If this bill specifically stated that under the interstate commerce clause, a person qualified for a concealed weapon permit in one state is allowed in the course of pursuing interstate commerce, allowed to carry a weapon with them regardless what other states laws are, then it would make sense to support the bill. This would remove some of the state's rights but only limits it to what the the Constitution stipulates are the rights of the federal government to act.