Have never been to either RV park, but I have travelled through the Scotts Valley area a million times since I formerly lived in the Bay Area and travelled this area on business for quite a few years. Be aware that Scotts Valley is on Rt 17 near the summit of the Santa Cruz Mountains. Rt 17 is a long, winding (2 lanes in both directions) road that carries heavy traffic into the San Jose area in the a.m. and heavy traffic back in the p.m. It is considered one of the Bay Area's most scenic roads.....and also one of its most dangerous due to traffic volume and speed. And if someone should have an accident or break down, the traffic can back up for miles in both directions.
Getting your coach up there during midday should not be a problem. But then you may have to deal with the commuter traffic just to get out and start seeing the sights....and deal with it again when you return. Although Scotts Valley is not unreasonably far from Monterey/Carmel, it really is not convenient at all to San Francisco. One other point.....traffic on Hwy 101 getting to and through Morgan Hill can be brutal, especially in the afternoon.
Not trying to rain on your parade, just trying to help. Bay Area traffic during a.m. and p.m commutes can be, and oftentimes is, a nightmare. And it's getting worse every year. We travel there regularly....and I don't really miss it when we return home!! I would suggest you consider 2 locations to see SF and Carmel. I know that it is a pain setting up, tearing down, etc. But that is nothing compared to fighting the traffic you will experience trying to see such a large area from one location. You might do a forum search for suggestions on RV parks closer to San Fran. And, certainly, there must be a nice one down near Monterey or Carmel.
Have a safe trip...hope this is of value to you.
2003 Fleetwood Revolution DP