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How to plan a trip to yosemite valley 
Camp at yosemite. 
One fun option is staying right in the park at one of the 13 campgrounds. For the yosemite valley, your best campground options are the upper pines, the lower pines, the north pines, and camp 4.
Make a reservation on the yosemite website or call 877-444-6777. You can get a campsite for under $30 a night.