Last summer we went up I-15, to US-2 west, to 89 north.
I-15 is pretty nice really. Then it gets kind of flat and boring, but easy.
US-2 was being "rocked", tar and pea gravel. Real nightmare. Check for construction on whatever roads you take and avoid the gravel roads!!
Do NOT take 89 north with that 35tt. We took 46 ft of trailers and it was a mistake. Switchbacks, skinny road. More nightmare.
Take 464 out of Browning. Up past St. Mary, it hooks up with 89. Then short trip back on 89 to St. Mary. Easy trip.
Maybe take 89 south out of St. Mary without the trailer for a nice scenic trip.
Where are you staying in St. Mary?
