just saw your post so don't know if you are still looking for this, but there is a RV site called downtown Riverside RV park in Little Rock right next to the Arkansas River off of I30 and across from Verizon Arena and the downtown riverfront area. It stays busy during the summer, don't know about winter. believe it's gated.
There is one in the center around russellville, Lake Dardanelle. we have used this one and it is great. Here are a few other ones: Degray lake, south of Hot springs
Lake Ouachita, west of hot springs
Lake greeson, around the Murfreesboro area
Gilham lake, which is south of Mena and just south of that is
Dequeen lake. We have used both and during the winter, there are not many people around. When the weather is freezing they may turn the water off. these will be Corp or state lakes and are not gated, but there is very little trouble in these areas.
2003 Fleetwood Discovery 39S/ 3 slides
Now using a Toad
2014 GMC Sierra All Terrain 4x4