We are considering a one week road trip from Denver to SF in June. We would fly into Denver and drive to SF (and fly home from SF). What car rental is best for a drop-off one way rental? What are the safe but inexpensive places to stay on the trip? We want to enjoy the outdoors and natural beauty more than visit museums or tourist traps. Any suggestions on the route? What stops are recommended? How much do we stay on the Interstate as opposed to getting on some beautiful scenic secondary roads. Any ideas?