Yeah, totally a neighbor "deal." Bummer.I dont have property in Montana, but I have an LLC there for an actual business. I used it to register my 80 there. That lasted 6 months until I got a letter then a second letter from the CHP telling me that my rig needed to be registered in California. The law is pretty clear about it and didn’t feel like fighting it. Part of me thinks its was neighbor that reported me since we have an ongoing beef.
My neighbor is a retired county sheriff, we get along great. He's got a impressive car collection.
My wife worries about getting pulled over. I've told her, I have a MT license, and property tax records to prove our residence. I lose zero sleep over this.