One thing we always struggled with, when traveling with an RV, was locating grocery stores in a new area. With so many others now traveling with a cooler in the trunk, planning to cook a meal, perhaps we could compile a list of grocery stores in given areas, then mark it as a sticky?
Vons / Pavilions (both a division of Safeway)
Ralphs (owned by Kroger)
Food 4 Less (owned by Kroger/Ralphs)
Also, some Targets and Wal-Marts in our area have a grocery dept. (My local Target does, but my local Wal-Mart does not.)