You probably only need to isolate the most populous centers.
I'm not a ham, but I'm sure this thingie http://www.iritel.com/iritel/latinica/proizvodi/radio%2520ko...
will cover very sizable area without a problem.
will cover very sizable area without a problem.
Edit: For comparison Egypt is about 387,000 sq miles.
I realize that you would not have to cover the entire country to be effective, but probably at least 90% of residential areas. Especially in Europe where the radio operators only need to reach over a nearby border.