Let me do a little research and get back to you on campgrounds among the coast. I can think of a couple of campgrounds that is walking distance to the beach but need to find out about hookups.
It's not ocean side but I'm spending Memorial Day weekend at a nice regional park inland (Prado Park in Ontario/Chino area). It has a lake, lots of sites that are large & open, hookups are included and reasonable price. It's pretty by it self but there are many stores and a big mall are just a reasonable drive. Beaches, desert, mountains, Magic Mountain, Knott Berry Farm, Disneyland, and Hollywood can be within an hour drive (during non-heavy traffic periods).
State parks with ocean view sites are almost double in price but those cg/sites that is close enough to walk to the beach tend to be more reasonable. My experience is very limited so I'm going ask around for ideas or suggestions.
Great choice for "Living within my means" and camping for one...
2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
Camping History: 45 Trips / 133 Nights / 3736 Miles
FRF Social Group: Campers of the West