Alas, I'll be travelling in coach and, since I'll mostly be travelling with my family, a program like priority pass that (to my recollection) only allows the passholder in won't work.

It seems like I need a lounge membership (perhaps temporary?) or an elite card, right? As I say, I've got the highest status in Star and Skyteam, so if any oneworld carrier is an easy match . . . .