[Winegrower]

No doubt Montana license and registration is a money saver on the surface.  It is advisable to do a little due diligence before you make a decision.  With the economy the way it is and states looking for additional revenue it may serve you well to read the state law where you reside and have your attorney's opinion in hand if you are stopped and have to explain why your driver's license is from one state and your coach is registered in another.  Kind of reminds me of Dirty Harry "Do you feel lucky?"