I strongly urge you to HIRE A LAWYER (caps intentional).
My guess is that you have about as much business practicing law as I do piloting a space shuttle... meaning none. Please understand that this is not personal to you. It is a simple truism in the legal profession. It is very easy to screw up a case when one does not understand the complexities of the rules of evidence and the rules of procedure; and you are very likely to screw up your case if you serve as your own lawyer (ergo Abe Lincoln's famous quote... "He who represents himself has a fool for a client.").
In my opinion, the best defense for any traffic citation anywhere is to hire a local traffic ticket lawyer. I can't speak to the Helena, MT area per se but in Miami, Fl where I have been a practicing criminal defense lawyer for nearly a quarter of a century, there are many skilled and experienced traffic lawyers who know the law, the procedure, the Judge and probably the cop. In short you will almost certainly get both competent representation and a better result for a relatively small fee / investment.
That said, I hope that I have been helpful in answering your question.
As an actual Montana criminal defense attorney, that often practices in Hamilton, I would love to answer this question. Short answer: it depends. How important to you is fighting the traffic ticket? There are certainly ways to fight speeding tickets. The issue of it being marked probably won't matter all that much, but under certain circumstances it can. If it is important to you I suggest you at least speak with an attorney - many, myself included, offer free consultations. Good luck!