I was at Styx River a week ago and am at Mountain Lakes Resort now. Styx is fairly new to OCP and its an old former KOA acquired in the last 5 or so years. The roads are in bad shape and narrow so for big rigs its quite tight. The camp sites are dirt and not the most level. They have lots of plans for improvements but we spoke with a couple that are members there and they told us that they have not seen anything done in the past 2 yrs. The club house and café are nice though.
Mountain lakes is the complete opposite. Its well maintained and the facilities are very nice. The camp sites are gravel and grass and level but could be a tiny bit bigger. My only gripe is there are lots of people that bring their own golf carts with them and seem to just drive around the CG for something to do. Its been a constant parade of noise and dust. Just a peeve with me. I would still come back to Mountain Lakes. Its nice.