We do the same thing in Las Vegas NM. At least one guy stays with the truck. We used to arrive by about 3:30 am but they quit staying open all night. So now we make it about 5 and bribe the guy at the front door to let us shop and self check out.I’ve been in a lot of places but I will say... the Walmart in silver city is s k e t c h y at night. I tend to babysit the vehicle while the boys take care of shopping.