The reason we decided on mexico in the first place was because, somewhat like you, guests will be coming from all over the world. Some of my family who lives a little closer to us asked if we were doing an AHR. I've just told them that we completely understand if they cannot make it to Mexico, but we don't have the resources (time, money, energy) for two weddings! (i.e. destination and at home reception) But everyone is invited to Mexico. So I guess that is how I've skirted the issue. People who cannot make, but who want to celebrate with us, will be able to do so at the wedding shower my grandmother is planning for us.