To Schofield Barracks from the airport, take the H1 to the H2. When the H2 ends (at Wahiawa) turn left at the second light (Kunia Road). Turn right at Lyman Gate. From Lyman Gate take a left onto South Range Rd. then make another left onto Kelly Rd. Make a left onto Pirowski Road. The 500th is on your left. Use the parking lot behind the building.