Mecca of Yosemite climbing
This iconic campground, situated in the middle of Yosemite Valley, was once home to many of America's early rock climbing pioneers. It is so historic that it is listed on the National Registry of Historic Places! While the campground is no longer home strictly to climbers, you'll still see many of them walking through, whether to find partners, or to project many of the classic boulders within the campground limits. It is the absolute best campground to stay in if you're climbing in the valley.
The facilities are top-notch (running water, toilets, trash bins, picnic tables, fire pits), as is the access to nearby climbing and hiking. It also happens to be one of the few campgrounds that doesn't take reservations in the park, so for these reasons, be sure to show up EARLY in the morning to snag a site. It is extremely popular. In June it's pretty hot, but fortunately there is ample shade.