Yeah I would just go to Walmart
If you're looking for overnight parking, I would avoid it, I'm sure that's not allowed. There's a Walmart on the other side of Meridian that might allow it. If you're just looking to do some shopping while you're out in your rig, you should be able to find parking on the west side of the mall, near Macy's. I'd avoid the East side nearest Meridian, it s the most heavily traveled & it can be impossible to find parking for a normal car/truck.
I have never seen any semi parked on the property, hope this helps
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