You can camp in the backcountry with your own horse. I'm not sure where a horse trailer could be parked (I'd guess a campground with RV spaces be OK). The park concessioner (Delaware North) has stables and other facilities for horses.
http://www.nps.gov/yose/planyourvisit/stables.htmQuote
You can bring your own horses or other stock to Yosemite and ride on most trails. Visit our stock information page for more information.
http://www.nps.gov/archive/yose/wilderness/stock.htmQuote
Overnight boarding facilities, spot packing, and day rides are available from DNC Parks and Resorts at Yosemite (DNC) whose liveries are located within Yosemite National Park. Horse owners are responsible for making advance arrangements for overnight use and reservations are suggested for all services. Information may be obtained by calling DNC at (209) 372-1000, or by accessing the DNC Parks & Resorts at Yosemite web site.
Post Edited (06-07-07 12:40)
