Twin Cove is a popular campground in Rockport State Park. It is conveniently located near the marina (but with no direct access) and right next to a nice beach for swimming and wading. Campsites here are spaced a bit more tightly than at other campgrounds in the park, but there is still ample room, albeit with no privacy between sites. Some sites are not as flat as you'd like them to be, and shade is scarce.
Each site has a picnic shelter, table, grill, and a fire ring. There are two pit toilets and five water faucets spread throughout the campground.
Note: Twin Cove Campground is open from May 1 through October 31.