Always check with town and or county officials to see what is allowed and what is not. Here in Rock Hill its OK to detect the parks and property along streets between the sidewalk and road.Sounds like Seneca is just like national forest......you can detect all you want!Just dont dig!! I would check with the other nearby towns too.You may be able to detect in Wallhalla, Westminister or Pickens. Clemson is close also.You have a lot of lakes there too! There are some good finds around and in the ole swimming holes! Tunneltown would be sweet but Im not sure what or how much is on national forest. You may want to check into that....I was told there was some private land really close. We do a lot of camping at Cherry Hill campground through the summer and always I have my detector. If ya wanna get together and do some detecting let me know.Good luck!