Hi Aeromax. Welcome to irv2.com. There is a rally coming up of fellow hdt rv'ers: www.hdtrally.com
You should come there! I'll be there. I'll take a very un-educated guess at your question. I think you would be able to license the truck as a private truck according to weight. That's the way MN does it anyhow. You shouldn't need an apportioned plate as semi tractors do that are involved in commerce. I'd guess the gvwr of the tractor is somewhere around 33k lbs? So you'd get plates for that. I don't think you need commercial insurance if you're only using it for private recreational use. No commerce. Hope to see you at the hdt rally. Come say "hi" to me. I think I might be easy to spot since I'll probably be the only truck conversion there.