While I was excited to see dinosaur prints and hike and see petroglyphs, I was a little nervous about the rock crawling. My husband and son insisted, so we did it. Robert was very understanding and offered to stop whenever I needed, but I never needed. My 16 year old son was in heaven, and I felt quite adventurous. What excitement! Robert was skilled and informative and fun to be around, the Jeep was great, and we absolutely recommend this adventure for anyone and everyone who finds themselves in or around Vernal.