A notable, affordable family destination campground for RV or tent camping is Lane Spring CG in Mark Twain NF, Missouri. What a deal for $8 per day w/no hookups or $15 per day w/electric hookups. See
http://www.forestcamping.com/dow/eastern/mtw.htm for details.
Excellent wading from a pebble beach along Little Piney Creek

Observation platform overlooking the picturesque, spring-fed Little Piney Creek

Pull-through campsite

Steps from campsite down to the "wadeable" Little Piney Creek

State-of-the art playground
