This is a small, multi use town park, located 13 miles west of Rugby, ND. (Geographical Centre of North America) that is free.
It has roughly 6 undesignated campsites on the grassy lawn, that had electric with plenty of room for tenting if no electric was needed/desired.
It is accessed from a side street, just off of the main street.
It has a fairly large sheltered picnic area, picnic tables, washrooms, potable water, electric, but no fire rings, or showers.
Close to a gas station and just down the street of a grocery store. Residents in the area were respectful of you being there and were not 'nosey' at all. It was actually fairly quiet.
Conditions when we stayed there (July 5 2011) was sunny, with temps near/slightly over 100*
Nice little spot for an overnight stay, as there isn't much else in the nearby area.
Cost per night: - FREE
Park Info: - http://freecampsites.net/towner-city-park/
Google Maps Location: - http://g.co/maps/335qd
Dusty