We've spent most of our twenty years of camping together off the beaten path, avoiding the likes of anything KOA, but for our RV's maiden voyage we thought we'd start with the Machester Beach KOA, and we were very glad we did. We arrived early evening as camp activities were getting underway, setting up to the soundtrack of Beetlejuice showing nearby. The site was clean, KOA's office and service staff were very friendly, not that corporate-disengenuous-give-us-a-good-rating friendly, but real, authentic hospitality. Everything quieted down after 10:00p. We stayed for four days, enjoying everything the area has to offer from Mendocino to Point Arena and had one of the best camping experiences of our lives, and it wasn't just the RV that made it that way.
One little-known secret about this site is that the beach (a moderate walk away) is the home of the Manchester Cable Station, built by AT&T in 1954 on the United States’ closest point to the Hawaiian Islands, where the internet backbone starts its journey across the Pacific.
We camped at Irish Point at Arrowhead's designated dispersed camping area. The road around the reservoir is pretty tight, though that doesn't discourage long trailers and toy haulers. We're pretty self-contained so didn't miss any usual camp ground amenities. Our neighbors were sparse and quiet and we enjoyed the peace of this area.
I've camped at Oak Creek for years, with family and solo. It's tucked away on Boulder Mountain and if you're not looking for it, you might pass it up. It's immaculate, great hosts, and quiet.
It’s a bit more primitive compared to Jaycee Park campground further north, but it was all but deserted and I could park my motorcycle next to the tent. Nice view across the river. Composting toilets and water.