Several RV parks and state beach campgrounds near El Rio accommodate larger rigs with full-service RV options and on-site amenities. Harbor Cove RV Resort provides full hookups and pull-through sites suitable for big rigs, plus fuel and service close by for convenient resupply. McGrath State Beach offers beachfront camping with easy access to sand, restrooms, and showers for a low-key coastal stay near El Rio. Ventura Ranch KOA features roomy pull-through sites and full hookups designed for larger motorhomes, making it a practical choice for extended stays.