Not sure if they allow it, but I have seen van lifers do it. There are a few Walmart stores in our city. I often see van lifers and Rv'ers in the parking lots overnight. There is a truck stop up i24 exit 24 as well that may be another option. It is about 20 miles from that Home Depot.
I doubt you would be able to. Check RV or camp ares nearby. That would be your best bet
You might want to check with the store manager about this
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