It wasn't me
I suspect, not entirely certain where warren is, that the airplane you see is going to, or arriving to a nearby airport. If they are circling, we all do that, it's part of a ground reference manuever.
There was a skymaster based at Pontiac, Red, I think, that had a camera ball attached for aerial photography (of the ground), but I don't know that it still flies.
For more information about where some Skymasters gather, read the MI Fly In 06 message topic. We West Michigan Skymaster owners (and Frank from Pontiac) get together frequently.