I have a few moments here so I will add a few thoughts, Gerry. And for all the "science" based skeptics, let me just lead with this: What we DON'T know about the universe far exceeds what we DO know. My theories will be based on my opinion, and my personal beliefs and knowledge.
IMO...see how I led with that?.....everything in the universe is energy and vibration. If this all goes back to your visit to ECETI, it's possible you experienced a change in your own vibrations, allowing you to see what many can't. I've heard from Native Lore that there are places on this planet that can change you. ECETI appears to be one of those from all I've read and heard about the place. I believe Clyde Lewis has had a few of his own experiences there.
I believe that we live in a multi-dimensional world.....which are often termed "planes" or "realms". For my purposes here, I shall use realms. I've had many experiences myself in seeing some of these other beings. I believe some are what we term elementals, or earth spirits, which the Native Lore also presents. I think what the Native's refer to and what wiccans/pagans term elementals are the same beings. I also believe there is a realm of demonics out there that can cross to this realm.
Once touched by these beings, many of us become a "beacon" of light for them and they can become drawn to us. I use sheilds, prayers, and various other tools to be sure nothing is attaching to me. I feel the realms are just different levels of vibration and energy, and that crossing to and fro is also how we see ghosts and spirits.
If you're not already doing it, I would suggest researching old pictures or depictions of entities that are of Native or Celtic origin that depict elementals or spirit beings and see how close some of your photos match them. Would be an interesting study to see how much correlates to reports from the past.