US-31 is certainly big rig friendly. There's plenty of road side parks, like miniature rest areas, as well as businesses with easy access parking lots. Petoskey is a bit of a mess right now, as half the highway is closed (Northbound lane detours, southbound lane is very narrow.)
The road between Petoskey and Pellston is very rough and bumpy... maybe I'm over sensitive but I found I couldn't go more than 35-40 for much of it.... people in bigger rigs were blasting right by me though.
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed