Drive west out of Westminster on Bolsa Avenue or Warner Avenue and both run straight to Pacific Coast Highway and the Bolsa Chica State Beach campground, surf out front, fire rings on the sand, the wetlands across the road. That lot is the night, because nothing in town takes a van overnight. One rule decides who stays: Bolsa Chica books factory-built self-contained vans only, and a conversion build is turned away at the gate.
The full overnight, fees and gate hours and stay caps, sits on the Long Beach campervan lander; from Westminster you just need the drive and that one rig rule.
A van is fine for two, tight for a crew. If you need the extra beds, a factory-built RV clears the same 40-foot Bolsa Chica limit, and RV rentals in Westminster has those.
Crystal Cove and Moro
Crystal Cove sits off Pacific Coast Highway between Corona del Mar and Laguna Beach, and its Moro campground is the cove overnight Costa Mesa leads. The site rules and booking are on the Costa Mesa campervan lander.