 Iron Horse RV & Trailers, mobile service, 208-228-9121. Locations in Rexburg, in Perkin, Utah, and now on the Louisville Highway, Idaho Falls. KID News Radio Studio, powered by Iron Horse RV & Trailers in Rexburg. Off exit 322, Highway 20, Rexburg. When the journey matters. Iron Horse RV, online 24-7 at ironhorservyandtrailers.com.