Inactive base my ass, thinks Henry. This smells even fishier than it did before.
"We can try, but we'll have to keep a low profile. Try to look like you're looking for an address or a parking space."
With that, he starts a slow, lazy circle around the base perimeter, making abolutely sure to not stay next to the base all the way, but instead staying 1 street block out from it most of the time. All the while, he drives sloooowly, and looks at pretty much every street sign, like someone looking for a parking space. He stops every once in a while, like he found one, only to go off a minute later, after pretending to check the local parking signs carefully.
You know that stereotype about old people driving slowly? They're actually government spies, and driving slowly is their way of looking around inconspicuously. Whenever you honk and shout at them, you get put on a black list.