We do the same thing. Lots of people say reflectix doesn't have much r value or live up to it's claims but our furnace cycles less and the biggest thing for me is I don't feel the cold seeping through when I'm sleeping really close to it.
Only pic I have of the insulation. Sure works good. Doesn't win any beauty contests but cuts the furnace cycles in half during the night and easily 50% less condensation. Oh, and I light the camper with 4 led strips, you can see one in the pic, and the reflective helps with the lighting!