Maryland Gate Entrance (Visitor Entrance):
Easiest way to do so is exit Interstate 95 onto Rt 22.
After about 2 miles - Rt. 22 crosses over Rt. 40 (Rt. 40 is under the overpass).
Get on Rt. 40 (through Aberdeen) heading towards Baltimore - for about 1.5 miles.
You'll pass a Walmart on your left.
Just a bit further down you'll see a sign (right hand exit) to APG - Maryland Gate.
Watch your vehicle speed as you approach and travel on APG!!