We are planning a late spring road trip , Utah, Wyoming and S. Dakota, after 3 days in Moab we want to go to Vernal Ut to see the Dinosaur National Monument. Looking at the roads between the 2 towns I have a problem, I cannot stand steep drop offs without guard rails...am doing a lot of research on this ! ! Is anyone familiar with UT 191 north to Vernal or the route that goes over hwy 139 into Colorado and back. Is the monument worth seeing.