If I use Costco the fine print says cont. US but Avis accepts the code and gives me a rate of $293 after taxes etc.. for a compact ($240 before) so will it be accepted in Cozumel if I print out the reservation? I need two cars for 7 of us and need a cheap rate. I also understand that all rentals in Mexico include liability in the rate by Mexico law so I will use my Amex for rental car ins. Any suggestions on Mexico car rentals?

Thank You all for this great site.