Thanks everyone! We are going to Puerto Vallarta via Costco travel! I got a little freaked out after booking because it was unclear if my tickets were basic economy or standard economy--with basic economy supposedly you cant even have a carry-on (not even for purchase)! Costco told me verbally it was not basic economy, that they dont do that (and I did see a policy listed on their website), but it didnt clarify anywhere on my tickets/itinerary. I called United and they first refused to verify anything for me, stating I could only do that through my travel agent; however, called back again and this rep says its standard economy. Phew!
lucky single mom to 20 yr old dd and 17 yr old ds through 2 very different adoption routes