Park is closed on Mondays. If, like us, you show up on a Monday you will be out of luck. We also tried the back entrance (to the west) and were politely turned around by a lovely park ranger before we even got close. There is another park directly to the south of here you can get into via back roads and/or hiking, but the views we found didnt compare. So remember - park is only open Tues-sun, 8am to 5pm.
Location: -29.15480, -50.06007