speaking for us only, we've paid for nearly everything with traveler's checks. the only places that don't take them are the mom/pop shops and the buses.
an excursion i would highly recommned for anyone adventurous is the adventure extreme where you use the atvs and go jumping into the flooded caverns was an abvsolute amazing day and can be booked at the sexy pool towel hut
does anyone know how much they charge for Xcaret? or jungle tours? we arent sure if we should book before or wait until we get there. already booked zipline! thanks