DOT sucks. Trying to stay legal is about as complex as the Federal Tax Code. Here is what I think I know after almost 20 years of dealing with them. I try to keep everything as legal as possible beyond that I try to keep everything safe, which should be the focus of DOT. I and those who drive that are employeed are in a drug testing consortium. However if you get pulled over and they feel you are due to pay a toll, your paying a toll. I know that sounds as if I being ignorant but I believe it to be true and this is why. When I go through a Port of Entry and pay for a trip permit or in Wyoming an off road vehicle sticker (Wyomings method of taxing heavy equipment that operates in the State). I have very little problems. Montana is the same way. When I go in and pay money for something they usually dont get me for anything more. However if you have not paid something, you will likely leave with less money than you started with. It seems as though the goal is to extract a "fee" from those who enter their State. I was told by one port of entry that "they have fun with excavators". I was no exception, that shittty day in Montana. Its a bad a deal. Like I said I do what I can to keep in their good graces, but if its your day to pay, you will be paying. How much is what it comes down to.