homemade:
I think your little boat would do well here. Getting down the road might be tricky, but I would bring it. Definitely would be useful and probably fun. The big power boats cruise by all day. You can hear their engines a few minutes before they pass. They usually end by sundown, though. There is a cement put in there.....
the road is narrow, but the 350 would do fine. I did it with my full sized dodge and camper. No problem. Slow, not a lot of turnouts in some spots. Pretty and a lot of turnbuckle checking this one. I would carry at least an extra 5 or 10 gal gas as none at Imnaha. It took me a fair part of a day to get there. Partly because I was alone, partly because I'd never been and stopped a lot for photos, Partly because of the big potholes and rocks. When I got out and back to Imnaha, I did not have enough gas to go south comfortably, so had to go back, to Joseph I think, before heading south. Bummer. This time I will know.
Those weekends might be good. won't know which for a little while. Would be great for a meet up. Never a bad thing to be outside! I would hope the winter was kind to the road.
I will check the calendar for sure....
dave