Answer
Ocean City is a resort Boardwalk beach with lifeguards (seasonal) and dense amenities. Assateague is a national seashore—wilder, fewer services, entrance fees, and different pet/ORV rules.
Bring water, shade, and insect protection to Assateague. Do not expect OC-style food stands every block.
Compare same-day surf on Beach Weather before you choose which shoreline fits the group.
Sources: National Park Service — Assateague · Visit Ocean City · Ocean City Beach Patrol
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.
