While setting up my tent and putting the poles together, I noticed that they could make an EXCELLENT portable antenna. The ones on my small tent are 12' long...but I'll bet the poles for a family-size tent would be at least 16' long -- that's a full size verticle for 20 mtrs. Base could be as simple as a block of wood with a hole in it.
That plus a few radials sounds like a great and very portable antenna.