We have driven that route in my pick-up, without the 5th wheel. Road is good, does have several sharp curves and a few steep hills in one section.Maybe about a 15 mile streach It is a scenic route, I don't think you would have a problem with your M/H, just might be a little slow South of Camp Wood. Width of road is not a problem, as I remember. It has been about 3 years since we have gone that way.
2008 Pleasureway Excel- Ford V-10
2015 Rockwood Mini Lite TT #2109S