Drivers Flat Rd from the staging area down to the campground is well-maintained hardpacked gravel but it is very steep in spots. Nothing a standard passenger car can't handle but there's evidence that folks who lost traction have dug ruts. The road and the campground are closed October 15 - April 15. You can still park at the top (it's a fee area) and hike down and back if you're in decent shape. Equestrians and bicyclists are also OK during the off season. There are 5 designated campsites, each with a picnic table. Advance registration is required and no ground fires or barbecues are permitted. There are pit toilets and parking for day visitors. There is also drive up access to the river for rafters both above and below some rapids.