We were there 2-3 days ago. While we camped at the base of the mountain at the KOA, we could have easily parked the rig with toad at the top of the mountain on a weekday in the dedicated RV parking area. That area in the park is along the roadside (pull in parallel RV parking) right at the visitor's center and where the trails start. Not a hard grade to climb getting there, Not particularly level but it serves the purpose.
Joe a/k/a "Americanrascal"
2016 Winnebago Adventurer 38Q +tow dolly
8th RV to sit in our driveway in 35 years