It is possible to drive to the trailhead on the south side of Squaw Flat Campground and do the Big Spring/ elephant Canyon hike (10.9 miles) if we are not camping in the park? I am also interested in the Chesler Park loop (10.9 miles) that starts at the elephant hill picnic area. Can we drive in for the day for this hike as well? I know the times needed for the hikes but not for the drives! We will have a 4x4 vehicle.