I am planning on going to Las Vegas from Minnesota. Choices are I-90 West thru South Dakota and South thru Denver then West across the Rockies. Choice 2 is South to Oklahoma City then West and North to Las Vegas. Another route would be West thru Wyoming and South thru Utah. Another would be South to Des Moines and then West thru Nebraska and Colorado. They are all within 100 miles of being equal in distance. I have a 2012 Winnebago Vista 35F with the V-10, 362 Horsepower, 467 lbs of Torque, with the Tow/Haul feature. Will I have a difficult time traversing the Rocky Mountains with a Gasser or should I try to avoid the Mountains entirely? Crossing the Rockies is the shortest route. I likely will be towing a car with a tow dolly.