LAN flight BsAs to Mendoza
Booked a roundtrip flight from AEP to Mendoza in a couple of weeks. Purchased the ticket through American (code share) to get AAdvantage miles and credit card bonus points. All I received is an e-ticket confrmation via email. It does not appear that we have assigned seats. Do we just need to show up at the airport with the e-ticket printout, or should we try to get online and get seat assignments and print boarding passes prior to the flights? Also, how early do we need to arrive at AEP for the flights - we depart at 5:50 pm? Do we need to be concerned about luggage weight limits (will have one carryon each, nothing to check). Any other tips for flying LAN?