A while back I purchased an Ed Fong dual band (2M/70CM) DBJ-2 antenna for field use. Roll up “slim jim” antennas are an excellent choice for your go bag. You can hang them from a tree branch in the field, but what do you do when there are no trees around?
Last weekend my wife (Julie, KN6AOC) and I tried transmitter hunting (also known as amateur radio direction finding or ARDF) and antenna building for the first time. The Fullerton Amateur Radio Club setup the event and had mentors available for us.