Problem: Two groups leaving same day about an hour and half apart. First group will arrive, get car, and drop off luggage at hotel and drive back to airport and pick up group number two. We are renting from Amigo, and plan is for group one to pick up group two at their lot. Once we land, we have no way to communicate since we won't get our rental phones until later when they get dropped off at hotel. If all goes well, we just meet up, but if there are delays, we need a point to contact or to leave messages. I was thinking about calling cards to the US where we could each leave messages on voice mails in an emergency. Can you buy these at the airport? Rather get one I know will work in Aruba by buying it there. Or, should I just buy one here? Or use the credit card pay phones (hear these can be costly).