Large bright Disk

I was on a fishing trip and camped at Fourchette Bay on Fort Peck Reservoir when I went to bed early and got up sometime in the middle of the night between 10:00 pm and 4:00 am to relieve myself.  My camera and my cell phone were in the boat so I didn’t know what exact time it was. The coyotes were howling and the thousands of stars were big and bright as I have ever seen them.  There is no light pollution in the middle of the prairie land. I walked around my truck to relieve myself when I glanced up at the sky and saw a flash of bright light that looked like a comet, a way bigger flash than a shooting star. I said to myself, “cool, a comet,” but I was more interested in receiving my full bladder.  When I finished relieving myself, I again glanced up to see the “comet” only to see that it had turned into a very large, disc-like shape. It resembled the horizontal shape of a frisbee.  Since I didn’t have a photo, I drew what I saw over photos I had taken of the skyline the night before this happened:  Comet looking flash of light:   Turned into this shape:   I was in awe and I think my jaw had dropped to the ground. The coyotes had stopped howling and there was absolutely no sound from this craft that was hovering just above the skyline. It started slowly to move east and simultaneously lengthen its shape. It moved alongside the reservoir toward Glasgow Montana and Fort Peck Dam. Fourchette Bay is at least 366 miles from Glasgow according to google. When I saw the disc a quarter of a mile atop the hill from our campsite, I’m guessing the spacecraft was at least the length of a football field. The middle of it was filled with a completely bright, white light—as bright as the brightest LED light there is and it had a luminous blue hue surrounding it.  I thought about getting my camera out of the boat but I got scared thinking this thing may see me and snatch me up. I became nervous but not terrified and decided to hide myself behind my truck.  As I watched this thing move laterally and slowly eastward, it lengthen as it moved. Aft! er it moved further away, and I couldn’t tell if it was a mile long, 5 miles long, or a 100 miles long, or how fast it was really going.
 I was so in awe I didn’t even think to wake any of my friends. When I told them the next morning of what I had witnessed, they were silent and probably thinking I was nuts!  I really don’t care if anyone believes me.  It has taken me 3 months to digest this experience. I finally found your website and looked at the reports and this report may be the same craft witnessed by 3 more people:    I would like to communicate with them and see their photo, so if there is a way to talk with them it would be through you folks. I know myself well enough to know I don’t have the imagination to make this experience up. My perspective about the reality of our world has changed.  I can no longer look at the sky as I once did.  I now am open more than ever to all possibilities of this reality being more than what our senses tell us…. This was an experience that haunts me everyday and now I want to know more.