The office is right in the middle of Campeche's downtown. We booked the trip one day before, and they organized everything. Next day we were picked up at 5 am on a very good car. The breakfast was also really good just two hours away from Campeche. Without any trouble we arrived at Calakmul 5 hours later. The site is amazing and it is the 5 hours ride worth. Our guide was very good.