Yeah. Maybe walmart would be more fun. It's got a bit for fun stuff. Like hockey equipment, some guns/bows. Bikes to ride around the aisles. Food galore and bbqs. A huge electronic section, and a pharmacy . If there was any place to have free run of for a night, I'd pick walmart, or a similar wholesale warehouse store. Costco would be ok but they don't have quite the variety.
Just watch out for golden Freddie and don't keep the shutters down, that will drain your battery too fast...
And keep an eye on the pirate isle, the animatronic there seems a bit shy when the cameras are on him.