RV parking is permitted at the summit parking lots, but no hookups are available.

Summertime visitors will find camping just a few miles over the pass at Kachess Lake Campground (exit 62, then Forest Road 49 approximately 5 miles to campground, 509/649-3744, www.reserveamerica.com, mid-May–mid-Sept., $17), which has tent sites and can accommodate RVs up to 35 feet, though there are no hookups. The blue-green lake offers swimming, boating, picnicking, and a nature trail. Its accessibility from the freeway and to the trails make this an extremely popular place to roast up s’mores, so you’re taking a gamble coming here without reservations on a holiday weekend, though there are a number of sites available on a first-come, first-served basis.

Crystal Springs Campground (exit 62, then right on Forest Road 54 for 0.5 mi., 509/852-1100, mid-May–mid-Sept.) is another favorite base camp retreat for Seattleites with just a spare weekend to get outside. Smaller than Kachess, the grounds tend to be quieter and all sites are first-come, first served.