That would work, too. I agree that the Federal government doesn't have a saterling track record of management in general! If all the states could agree to a single standard, that would yield the same desired effect - elimination of "law traps" for decent honest gun owners who travel.
For more information of NFA Gun Trusts or to learn if your state permits ownership of Silencers, SBR's, or Machine guns without your CLEO's signature visit the Gun Trust Lawyer website.