Joshua Tree National Park is an amazing place to visit. The Joshua Trees are full of buds and ready to bloom. If you like exploring and climbing massive granite boulders this is a great place to visit. There are nine campgrounds at the Park. Most do not have water or power so you have to come prepared. Generators are allowed but only during limited times. Since sunshine is very abundant, adding solar power to your RV is the best way to enjoy your stay.
Today I installed two 160 watt solar panels and a PWM charge controller on a 2014 Thor Miramar 34.2 Class A motorhome. The best part of this job was the excellent surf rolling in. The San Elijo State Beach Campground is near Cardiff by the Sea and many of the spots are on a bluff overlooking the Pacific Ocean. You can run your generator but only during the day. There is no power at these sites so having a solar system to keep the batteries charged is the only way to go.