I have never seen a Bortle 1 sky in my life. I have seen several Bortle 3 skies, and Bortle 2 skies a few times (sadly, before I was into astronomy).
What is the impression under a perfect, pristine sky? What does the Milky Way look like? What does the zodiacal light look like? What do stars look like? How much color do you see in the sky? Can you see your surroundings? I have seen reports about people getting lost in the constellations, and not being able to discern even well-known asterism such as the Big Dipper. Note: we talk great skies here, with little atmospheric extinction, perfect seeing, little humidity etc (of course, no moonlight! And preferably, no Venus up...). I know a a few of you have been fortunate enough to experience such skies. Please share your experiences!