Summer nights on Palomar Mountain run cool, in pine and black oak at about 5,000 feet, with the white dome of the Palomar Observatory showing through the trees on the ridge above camp. Observatory Campground sits almost underneath it in the Cleveland National Forest, and the Observatory Trail leaves from there and climbs through the pines toward the dome. In the evening the air up top is a different season from the valley floor, so pack a jacket even in July.
Doane Valley, inside Palomar Mountain State Park, is the mountain's other campground, a meadow ringed by black oak where the light comes in low late in the day. Both put you in the same cool woods for the night. Which one takes your rig comes down to its length, and the road you drive up comes down to the same question.
Up Palomar from Highway 76, and the campground that fits your rig
Two county roads climb the mountain from Highway 76. S6 is the famous one, switchbacking up from Rincon Springs with the valley opening out below every turn, and the state park describes it as scenic but steep and winding. For a motorhome or anything on a hitch, the same page points drivers to S7 from Lake Henshaw, the gentler grade. With a 30-foot rig and a family aboard, S7 is the road that gets you to camp relaxed.
Observatory Campground is the pad for a full-size motorhome up to 32 feet, and the Forest Service page lists 42 sites for vehicles that size, booked on Recreation.gov, with no hookups listed as of September 2026. Doane Valley is the tighter camp. California State Parks caps trailers and motorhomes at 24 feet, which is shorter than most family motorhomes, so a bigger rig sleeps at Observatory and the meadow becomes an afternoon under the oaks. Two people who want to wake up in Doane Valley itself can size down with the California campervan listings.
Observatory fills on summer weekends, so reserve the site first and book the rig second. Coming up after a hookup night at Dixon Lake means you arrive with empty tanks and a full battery.
Dixon Lake above Escondido
Dixon Lake is the weekend close to home, a city-run lake above Escondido with campsites stepped up the slope so the rig looks out over the water and the lights of Escondido beyond. The deluxe sites carry water, 30-amp electric and sewer, enough to run the air on a hot North County afternoon. That makes Dixon the natural first night before Palomar, or a whole weekend on its own when the mountain is booked.
Reservations open 90 days ahead, and like Observatory, it's the site you lock before the motorhome. If Dixon is full, Guajome Regional Park in Oceanside is the coast-side alternate: two ponds edged with wetland and chaparral, migratory birds working the reeds, and 33 tent and RV sites booked through the county.
For a night right on the ocean, South Carlsbad State Beach has its own write-up on the Carlsbad campervan page.