We were at Rickett's Glen SP in August. It's a truly beautiful park; here's the view from our campsite:

The hike to the waterfalls is spectacular. Here's just one of the many waterfalls:

Getting to the park is another question, especially for those coming from Red Rock and traveling north on 487. Fortunately, we came from the north (Dushore) but we did leave the park and took 487 south towards Red Rock. As these photos indicate, please be careful!


We didn't have any issues traveling down the 18% grade, but we were in a relatively small RV (a class B Roadtrek).
But, in summary, Rickett's Glen is worth the drive to get there!