If you're interested in Santa Barbara, we have a burgeoning gourmet/wine tasting area known as the Funk Zone. If you can, you can camp at Refugio State Beach or El Capitan State Beach (NOT the RV park). There's a free spot up there, too, but it depends on your camping situation - or we have lots of places to stay (including my place). The harbor has great food, State street has good shopping and restaurants or just park near the beach and relax...it's SB! If you head south, think of camping at Leo Carillo or Sycamore Canyon down near Malibu - those are great spots.
I don't want to type it all out, so you can visit my guidebook that I have for people who rent my apt (don't worry, you can stay with me if you don't mind a fun well-mannered, scary lookin' dog.
https://www.airbnb.com/rooms/1255342#maps reclick 'maps' if the map doesn't display right.
For reference, us So-cal kids call Highway 1 the Pacific Coast Highway (PCH).
Passing through Malibu - depending on your appetite and wallet
Expensive for what it is, but it's in all the movies: Neptune's Net
If you're up to avoid some PCH, turn left up Mulholland Drive and stay on it until you reach the Rock Store. On Saturday, you might run into Jay Leno and a sweet car. Turn right on Malibu Canyon to dump you right back on PCH. The BLT and egg sandwich is a good breakfast!
Expensive but awesome sushi - Nobu
Duke's Malibu is a tourist spot but not bad. 1/2 price bottles of wine on Wednesday
Tra Di Noi - fantastic Italian food in Malibu
D'Amore's Pizza - really is quite good
Country Kitchen in Malibu - locals eat here. 'Nuff said.
Moonshadows - overpriced, but hey, the view kicks butt (I had the same view from my apartment up the street)
Cholada Thai down near Topanga - good Thai food! NOM NOM. Cruise across the street to watch Topanga waves
Gladstone's at PCH and Sunset Blvd - meh nope.
IF YOU CAN - GET TICKETS TO THE GETTY VILLA IN MALIBU or simply plan to visit. The views of LA are spectacular.
I've been out of LA about a year and a half now, so I'll leave anything south of this up to the Angelenos now!