Answer
Assateague day trips are easiest from the Berlin / Route 611 corridor. Castaways / Sun Outdoors Ocean City markets a very short drive to the National Seashore (operator materials have cited roughly four miles). Island Resort Campground in Newark, MD and Frontier Town are also classic Assateague-pairing bases.
Ocean City Gateway in Whaleyville and farther inland parks still work for pony days—they just burn more windshield time. Delaware Fenwick parks lean Assawoman Bay and Fenwick beaches first.
Pair your shortlist with Assateague camping FAQ if you might sleep on the island too.
Sources: Visit Ocean City · National Park Service — Assateague · Sun Outdoors
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.
