Just make sure you don't get pulled over in your state, the jig is up if you show a drivers licence from your home state and are driving/pulling an RV with plates from Montana.
This is hardly the same as a rental. You own the vehicle and have commited tax fraud in the example this thread is about. Similar to the fact that you have a reasonable amount of time to re-plate vehicles when you move to a new state. I have read of several people on RV forums that were caught this way and had to not only pony up the taxes on their RV, but also fines and interest. If you get pulled over and it's obvious you live in state and have a registration out of state for an RV (without dual state citizenship, i. e. permanent address), you can be held accountable for the taxes you should have paid on your RV.
I read some discussion recently on the escapees forum. I don't know the factual accuracy of the comments but I think someone reported that California was cracking down on the practice and requiring motor home owners (or the owner of the LLC operating the MH) to buy some type of expensive commercial vehicle permit to transit the state.
A MT LLC is a legal tax dodge in MT but states where owners actually live are likely to frown on this tax evasion trick. Nothing would prevent the state of residence from going after the owner for sales or use tax.
I have a good friend who is a TX state judge. He explained the liability issue several years ago when we were both members of a classic car club that wanted to vote to "incorporate" to protect members from personal liability in the event another member, not properly insured, caused personal injury or property damage during a club event. The judge explained that when a corporation or LLC is privately held, by an individual or family, for example, if injury or damage was caused by the corporation or LLC any lawyer one year out of law school would file a lawsuit against the corporation or LLC AND the individuals who own the corporation or LLC.
Attempting to avoid personal liability by forming a corporation when it is not a publicly traded corporation is an internet or truck stop myth. It is very unlikely to work in a real lawsuit in a real courtroom.
This does not apply if you have an LLC in MT claiming ownership of the RV. The RV is titled to the LLC not you. The home state in this case would be MT, so regaurdless of what state you live in it is legal. Aperson is free to own a business in another state, and that business is allowed to own property. And last I check a buisiness is allowed to move its vehicles freely across any state in the US.
Some states will legally hide the identity of an individual who owns a LLC. Therefore the lawyers only know to suit the LLC and not the owner. Nevada and Wyoming are famous for this. No matter how hard a lawyer tries to find out the identity of the person who owns the LLC it will never happen. Google incorporate in Nevada and see what you come up with.
One thing I learned as a road cop, what "he said" or "she said" don't hold much weight. Interesting that nobody seems to be able to quote a statue or a penalty for their views, especially one that says you must match your drivers license with your license plate. Miight just be because there is none. .