We have a site booked for September in Dimond O, and are planning activities in Yosemite from that base. The recreation.gov site has times around check in and out, as well as late check in. But I'm struggling to find whether the campgrounds close at night, and if so, when. We're thinking of late-afternoon horseback rides followed by dinner in the Yosemite Valley, and want to be sure we can get back in to our campsite.
It will be our first time in Yosemite, so forgive any rookie questions, and thank you for any insight you might have.