Roger,

Lightest enclosed trailer would probably be a Schreder tube trailer.
Empty, they can be as light as about 700 lbs for a 15 meter ship.
Fixtures, stands, etc will add to this. Next up the line would be a
Minden Fab or SST tube. These are a bit heavier because of the wooden
floor (Schreder trailer has an aluminum floor). Probably 800-850 at
the very least. Then, you get into the glass trailers that have steel
frames, add in a lift tops, etc, and the weight goes up from there.
As Ray said, with his relatively light glider, the trailer and all his
goodies came in at over 1400 lbs.

I have used a local Co-Op to weigh a couple of trailers. Thier scales
are on 24-7, and there is no charge to use them. At least the one
near me.

Hope this helps,

Steve Leonard