Does route 39 still only go to just past Crystal Lake?. I remember driving that road when it was open to Angeles Crest Highway. That small stretch of road always had rocks in it. The big slide wiped it out and they never rebuilt it.
I don't think they ever did. I do know driving through wildnerness can be fun. I used to take Ortega Hwy past Lake Elsinore to shorten a route to UCR in Riverside by going to the 15 rather than taking the 91. The best advice is to make sure your car's had the maintenance done and have a full tank of gas. Mountain driving reminds people more than anything else the conveniences of civilization aren't always close at hand. You face the same problem of being stranded between L.A and Las Vegas with an overheated engine in the desert while on a commute through the I-15 past Barstow.