You were too close to the coast. If you had driven 50 to 100 miles inland, and looked along low terraces of the Pee Dee, Santee, or Savannah rivers, you could have filled your pockets full of Indian artifacts....I did....:)
(Those lazy Indians along the tidal creeks lived on shellfish, and had no need for weapons...)
Yup, We have some shell mounds here on Dauphin Island that were left by the Shell Mound Indians.