Answer
Lodging, popular restaurants, charters, water-sport rentals, and Assateague camping (if applicable) benefit from advance booking. Air Show weeks and July Saturdays sell out. Recheck confirmation emails for time-zone and weather clauses.
Sources: Visit Ocean City · National Park Service — Assateague · Ocean City Air Show
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.
