AUGUST 7 THRU AUGUST 12, 2018: BLACKTOP REPLACEMENT AT SUN PRAIRIE FACILITY. NO ACCESS TO UNITS UNTIL MONDAY, AUGUST 13TH 2nd Garage is a self storage facility in Sun Prairie, Wisconsin, just east of Madison. Conveniently located off off US Highway 151 at exit 101, ocally owned and operated with great customer service, and you provide your own lock and have 24-hour access to your unit.