40& 20M. wire antennas can cover regions and cross oceans on 100 watts, and are small enough to blend in, if that's what you want, unlike 160 & 80 meters or beam antennas which are always going to stand out. Less than 20 watts of FM will reach across a city, could be received by any radio, and are easily concealable in a small mobile kit.
Here’s a followup article that is quite interesting. Especially the farmer Kevin story.