Cape Henlopen State Park (near Lewes, Del.): Summer beach camping is always a tenuous venture, with the heat, the bugs, and the sand. But the facilities at Cape Henlopen make for the best beach experience: There are 159 wooded sites, several with full hookups and all with access to bathhouses and running water. Within the park, you'll find several miles of hiking and biking trails, guarded beaches, and great fishing.

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