Plenty of free parking, but the route to the Legion can be a bit tricky (especially in the dark!). You'll turn on to Benson Avenue off of Sulphur Spring Road, and then make another right onto Sulphur Spring Road. Follow this all the way until the road curves left down the Legion driveway through the flag poles.
Use 1617 Sulphur Spring Rd; Halethorpe, MD 21227 in your GPS and then turn left down driveway.
Rain or shine.