In 2000, I designed a modular portable HF antenna for portable use. Thousands of ops have built this antenna just as I describe it. Others have modified it so they could use materials at hand in their area.
In 2011, the file has been updated. Buddipole.com now has Featherweight Whips that are perfect for this project. $6 each plus shipping from Oregon. It's better to download the file
rather than to just view it. The pictures are placed correctly on the downloaded document.