Buckhorn Campground in the San Gabriel Canyon area offers a scenic forest setting and larger sites that can accommodate trailers, though hookups are generally not available. Crystal Lake Campground sits along a mountain lake with looped sites and seasonal water and vault toilets, making it a peaceful spot to park a toy hauler and explore on foot. Manker Flats near the Mount Baldy area provides higher-elevation, rustic camping with space for trailers and easy access to trailheads; pull-through sites are limited, so plan for secure parking and unhitching. Each of these campgrounds near South San Gabriel emphasizes scenic settings and access to outdoor recreation rather than full RV resort hookups.