Just throwing it out there...We are driving down mid May'ish. From Alberta. We can cross into Mexico in either Del Rio, Eagle Pass or Mission. Taking the Saltillo/Santiago de Queretaro/Puebla/Villahermosa route. As we live closer to the Guatemalan border in Belize, we might take the El Ceibo crossing (Mexico to Guatemala), and enter Belize at Melchor/Benque. We love Palenque, and a detour to the site is a possibility. We will be traveling with our dog.