Cape Henlopen State Park Summer Camp in Lewes, Delaware

Campers by the sea have a bevy of nature-centric options, from “Tails & Scales” (July 2-3) to “Fur & Feathers” (July 5-6) to “Time Travelers” (July 23-27), which takes campers outside the park to complete missions.
Fee: $60-$200
645-6852, destateparks.com