What would be the best route to take int Jackson Hole from Salt Lake City. we are flying from Boston to SLC and will drive to Yellowstone staying the first night in Jackson. Since we are not familiar with the area any suggestions would be helpful.We do know the drive will be 5 hours but would like to see some scenery on the way. Any suggestions? Some of us can be squeamish with high elevated roads...so don't want to scare the folks to soon in the drive... thanks..