I've now booked the trip: AEP-PDP and then MVD-EZE going back. Just to be safe, I gave myself an overnight in BsAs in case the inbound AR flight (MDQ-AEP) is more than 1 hour late (not unlikely, if reports I've heard about AR are to be believed).
I'll post a short summary of my experiences here after the trip (early November).
-- H