Agree that it is easy to miss the return if you aren't looking closely. Both my Garmin Nuvi and AT&T cell phone GPS go directly to the return lot if you choose National off the stored locations. Probably the same for other units as well. They'll route you through the back entrance by the GA/FBO terminals which avoids a number of lights and actually makes it quicker to get into the airport than if you use the marked route from the highway.