If you want a mirror in the trailer it should be non-breakable and lightweight. Plastic mirrors should fill the bill. When camping, I feel I only need to look at my face/hair as I am camping, after all. I simply took a mirror meant for a school locker and attached it to the inside of one of the cabinet doors over the kitchenette on my Scamp
. You can get these at drugstores, dollar stores, Target, office supply stores, etc. Now that school is starting it should be easy to find them. While these mirrors usually come with a magnet backing, you could attach yours with mounting tape, Velcro, Command strips, or Gorilla glue. I say Gorilla glue because it foams up a bit to fill in uneven surfaces. I believe you can get plastic mirrors, cut to size, from plastic supply houses such as TAP plastics.
approximately 7 1/2" x 10 3/8"