With 24.9% of the population being 14 or younger, Bar Nunn, Wyo is the best city in Wyoming to go trick or treating according to MSN.

Bar Nunn, which isn't far from Casper has one of the best seasonal attractions, Salt Creek Oil Field Ghost Lights.  This region of land is just 32 miles outside of Bar Nunn.  The lights that are seen from the creek are from the lantern of a spirit named O'Rourke.  He used to farm the area and still looks over it to this day.

Sounds like you need to bring an extra pair of underwear to go trick or treating here.