I am interested in this topic myself. I find it intriguing that you mentioned Native Americans. I lived near an Indian Reservation when I had a strange experience. A friend and I, probably age 12-13 at the time, were exploring the woods when we came out onto a field. At the far end of the field was a big red barn. Fearing getting yelled at for trespassing, we ran home rather than investigating. We figured we would inquire about the barn and maybe get permission to explore it. My friend's father insisted there was no barn there, but we were adamant. Eventually he agreed to accompany us to the location where, sure enough, no barn existed. For years I stored that away in my brain and chewed on it every now and then. Recently I heard a podcast where they were interviewing some guy who claimed he was driving...Don't really remember, the Midwest? Arizona?....and came across a town where the people knew about a little village that was completely visible, full of people and buildings, but would randomly vanish. The interviewee actually experienced the phenomena before continuing on his way. It is worth noting that this was located near an Indian Reservation as well.
I would be interested to know if you have made any progress with your dream. I have had two dreams that sound eerily similar to yours in the sense that they force you out of yourself and seem to be maps for your life that need to be followed. I have since stored those dreams away as well since the trail has grown cold so-to-speak, but Im always on the lookout for the next clue. Good Luck!