Many of us can try this at home, all you need is 3 polarizing filters. If you don't have 3 polarizers you can use 1 filter, a pair of polarized sunglasses, and a computer monitor or smartphone display (since those are polarized). https://www.youtube.com/watch?v=zcqZHYo7ONs&t=843s
I want to go where you go...what color filter did you use...?
I did not use any filters. The top picture of the nebula was taken through my telescope. The chromatic aberration is awful through my telescope, thus the blue halos around the stars. The other 2 photos were taken with a 35mm lens and camera mounted on my telescope. I have an equitorial mount with a right ascension drive to mitigate star trails. I shot everything with the WB set to daylight and made a few tweaks in LR to get the stars near to their true colors.
I had an opportunity to visit the Mark Twain national forest. The location I visited was listed as 1 on the Bortle scale, this translates to really dark skies. The Orion nebula was shot prime with my camera attached to my telescope. The others were shot with a 35mm lens. A D7000 was used.
I was awestruck when I saw these clouds dipping down from the sky. I wish I had my camera and was as at a good location but that's how things usually go. Taken with a Nexus smartphone and edited with Snapseed.