My Flickr contact Cristiano Pelagracci took this long exposure of a tent and the sky in Italy.
Star trail shots are done by putting a camera on a tripod and exposing long enough so that the earth rotates relative to the stars aimed at.
It will take some experimentation to get the exposure right at night with such a long exposure and every night and place will be slightly different. You’ll need to play with ISO so as not to under or over expose the long shot. As I’m reading, a good starting point is:
Wide angle lens
Wide open aperture
Shutter speed of 30 seconds
If you look at the photo and it’s washed out/over exposed, pull the ISO down. If it’s under exposed push the ISO up a bit. If the trails are too short, try a longer shutter speed.
I’ve never tried this but those are some ideas to start with if you plan to go out and give it a go.