.5-2 miles above ground

We were stargazing and noticed some lights coming over a small mountain on on the northeast side of our camping spot (#15 @ willow campground) there were 6 sets of two lights down the center of the vehicle and a single light at the tail end. It made absolutely zero noise as it floated from above the tree line to the opposite side of the campground circle tree line. We could see a shadow behind the lights of the vehicle that made it appear to have a cylindrical shape. The vehicle appeared to be big. And because of its size and closeness it should have made noise but it didn’t. The lights didn’t reflect onto anything and there didn’t seem to be a front vs back in regards to where a person would be to pilot it. We were next to a loud river and while the object was passing over all the outside noises stopped until it fully passed over us.