The Assateague State Park campground is open from late April through the end of October. The campground at Assateague Island National Seashore is open year round.

I can confirm that the above info is correct, the park is open "last week of April through the last weekend of October." from their website..... the National park is open year round though

No, last weekend in April through last Monday in October. 2024 dates are Wednesday, April 24, 2024 through Monday, October 28, 2024.