It’s definitely up and down, some a bit steep near Killington.
Should be ok with TT, I wouldn’t recommend a motorhome to do that route.
I drive it in winter to go skiing
2020 Winnebago Horizon 42Q
Maxum Chassis, 450 ISL
99 Storm 30H, 04 Southwind 32 VS, 07 Ellipse 40FD