I don't work their either, but I've never seen trucks parked there overnight. However there is a large parking lot in front and also a smaller one in back.
I don't work there, but there is space for you to park out front of the gym all the way to the rear of the parking lot
There's also an unused loading dock in the back you can easily park a 16 wheeler in. Though you'll have to walk around the Aldi to get to the front in order to enter the gym.
You can park with no hassles at the Walmart parking lot right around the corner from it.
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