When I first heard about the Yucaipa water park at the Yucaipa County Park & Campground, I knew I needed to plan a trip. I’m always down for a campground with waterslides! I tried looking for campsites right away, but soon learned that this is one of the most popular campgrounds in SoCal. So it books up far in advance. And we wanted to camp with a big group of friends, so looking for cancellations probably wouldn’t have worked well. We decided to book for the following summer, and it was worth the wait. The Yucaipa Regional Park is located in the middle of a city with houses and grocery…