I have worked guys on 30 and 20 with quad loops in livingroom window
frames.  My friend w9njy was telling me about a guy from St. Lewis who
makes portable loaded verticals out of fishing rods, computer ribon cable
radials, and the thing weighs 40 ounces.  Don't know much more than that
but if anybody is on the qrp reflector might get information there.
I think you will have better luck on higher bands and on cw.
Howard