I could use some help. We live in Denver Colorado and want to tow in the mountains, Estes Park and Rocky Mountain National Park. We have a Keystone Laredo 26RKS TT weight is 6185 capacity 3815 and tow with a 06 F-150 4X4 5.4 L V8 3.73 ratio 9300# tow rating. Hubby says it will tow just fine but it makes me a little nervous. I need to hear from people that have towed more than we have, which is not very much. I don?t care going up the mountain slow but it?s the coming down the mountain that worries me. I think we need to move up to an F250 diesel or the V-10. What are your thoughts?