For a stop over... Quartsite or Joshua Tree depending on which route you take.
There really isn't a good choice near Santa Barbara other than the State Parks which are sometimes booked solid, noisy and no extras...
North of Santa Barbara is Ocean Mesa RV Resort... high priced but nice it is not on the water side of Hwy 101 but is high enough you get some water views.
North of Santa Barbara in Buellton is Flying Flags RV Resort there are wineries in the area and it is near Solvang (tourist destination). It is inland right off of Hwy 101
Pismo Beach area has some good RV parks.
Coast state campgrounds around Morro Bay & San Simeon (Hearst Castle) are good.
Another Wine Area is in Southern California around the City of Temecula. There are lots of great RV Parks nearby plus casinos. Our favorite is the Rancho California RV Resort east of Temecula. Unfortunately, they only accept 30 foot plus Class A or 5th wheels.
Another favorite in the area is Tucalota Springs
http://www.tucalotasprings.com/
