We are going out to Glacier in 2 weeks. It is our first visit. We are driving a full size 3/4 ton Ram. It is 21 foot. From what I'm reading, I don't think I want to drive the Ram over the Going to the sun road. How much are the tours in the red cars? How many passengers do they take? 2-3? Thanks for any input. Also..where to camp with a 24 foot trailer..