Adding to Gary's good advice, I'd suggest touching base with Bryant Freeman at Eskape Anglers in Riverview,NB. He knows every rock and ripple of the Miramichi system, and could, I'm sure, point you to a good guide appropriate to your trip. Additionally, Bryant is the most knowledgable person I know of on the subject of Atlantic Salmon fishing, and a very fine fly tyer. Though I seldom fish in NB, his shop is my favorite in the hemisphere, and I stop nearly every trip I take. Tell him Lefty sent ya!