What part of Nor Cal? We used to live in So Cal and went to Sacramento area and Bay area quite often. We would stay away from 210 all together due to traffic. I hate stop and go especially when towing. I much prefer taking east Hwy 58 across from SR-99 to south SR-295 at Kramer Junction to south I-15. Much easier drive when towing. If coming down I-5 there several options to going east over to Hwy 99. Fuel is easy too. There is a Pilot just north of Bakersfield. A Loves in Tehachapi, Pilot at Kramer Junction (although more expensive) and a Loves in Hesperia where 395 meets I-15. If you must take the 210 stop in Castaic and refuel as stated above. I do not know of any RV friendly places between Castaic and the truck stops in Ontario!! Good Luck and be safe!