I had this idea in a dream. I had two ideas, but then I realized it was a dream and I had only DREAMED I’d written the ideas down, panicked and woke up, remembering just the one.
I was trying to figure out when the first people arrived in this area and Yahoo Answers said the first people were Dutch. It said they traded with Native Americans but apparently those weren’t people.
So I’m figuring 10,000 BC sounds reasonable but it might’ve been later, if you know the actual answer let me know. There was a huge sheet of ice over North America, so I’m not sure people came east that soon… but people are intrepid.