Kudos to you for gathering all this info and posting it, MainStreet.
Note that there are two different (but sympatico and mutually supportive) groups of folks: the Viva Palestina aid convoy, in Jordan seeking entry into Egypt when the AFP article was written, and the Gaza Freedom March group, in Cairo, originally intending to cross to Gaza at Al-Arish. I am in Cairo with the GFM group. (Sorry if that was not clear in my narrative.) Hedy Epstein is with the GFM group in Cairo. Most of us in the GFM group flew into Cairo, I believe, tho I don't know about HE specifically, I suspect that was the case.
Of course the GFM group has different components - there is a Jewish Voice for Peace contingent, for example, which counts Hedy among its members.