Looks like a good ride
Best, cheapest camping in Montery is at the Veterans Memorial Park.
How come you're going inland at Monterey and taking the Freeway to Santa Barbara? 1 South shouldn't be too crowded this time of year and Big Sur probably won't be fogged in until a little later in the spring.
Jamala Beach is another good camp ground near Santa Barbara, a little out of the way, but I'm told they have a killer hamberger joint there. Might be a little pricey for camping though.
Good luck, have fun and keep us posted.