I called this Walmart on 4/25/18. I was told they don't allow overnight parking.

Fairlakes Walmart

Large Walmart in large shopping mall with tons of parking. Mall also has a Target, DSW, Home Goods, ABC, BJ's Wholesale Club (with gas station), numerous fast food and full-service restaurants, gas stations, bank, and more. Grab coffee and a great bagel at Bagel Buddy's. Tony's NY Pizza is good for NY style pizza, whole.or by the slice.