I stayed here for a golf tournament in the middle of April 2021. The location is about 500 yds from the golf course. The website leads you to believe it’s first come first serve however if on the website select Lifestyle/Amenities/Camping you can make reservations and pay for your stay. My site was #29 which was not level, (>8” to level). 27 & 29 are connected front to back so I was able to back into the vacant #27 to get level. The neighbor next to me (#25), appeared to be full-time living in their multi slide out trailer that had temporary jacks on the slide outs as they were damaged. Not sure if the trailer could even be towed in it’s current condition. After getting situated a woman came out to ask if I was in #27, I said no I was in #29. So she hooked into the power on #27 saying there’s wasn’t working properly. Then proceeded to dump their holding tank at #27 sewer drain right by my picnic table. Very close spaces with no dividers between. Hidden Valley Lake Association doesn’t seem to put much effort into maintaining this campground. Could not get much cell service or internet even with a WeBoost cellular booster.