Answer
grocery-supplies covers general provisioning—grocery-stores maps full-size supermarkets on the island and West Ocean City mainland, peak-hour lines, and which chains stock beach-week coolers before Boardwalk markup wins.
Sources: Visit Ocean City · Town of Ocean City
Editorial visitor guidance for Ocean City, Maryland. Confirm current Town of Ocean City, Maryland DNR, NPS Assateague, and NWS rules when regulations or safety apply.
