Other than the section that is closed, the other thing I can add is that campsites and RV parks along the beach are EXPENSIVE.
This post lists camping along the PCH, aka CA-1.
This post lists campgrounds along US-101, which happens to run parallel, and even concurrent at times, with the PCH.
These are listings of public campgrounds, which are generally a little less expensive than commercial sites. Bear in mind that you could call for reservations and find that they are already booked. RV'ing is pretty popular these days, and with so many kids still on Distance Learning, parents are just picking up the kids and getting away to the local beach.
Donna