I live kitty corner across town from the Meijer headquarters, so I kind of hang out in the land of many Meijer stores. That said--I have never taken note of RVs parked overnight in their lots. There are two Wal-Mart stores in the greater Grand Rapids area as well.
Their
Customer Service page might be a good place to start for asking the question.
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2017 Cedar Creek 38CK Hathaway Edition
2015 Ford F-350 6.7 CC 4x4
B&W RVK3300
Full-timing since 5/2/2016. Roam Sweet Home.
FROG Int'l Rallies: 2012-2017