Getting to Aguateca is not particularly difficult, if coming from Guatemala city catch a bus to Coban then a bus to Sayaxche. From there you can have a guide take you via wooden canoe, they are not dugouts. The canoes have motors, but the trip takes a few hours, the last of which is through very narrow swampland. Be prepared to dodge weeds that brush against the boat, as well as the pole that the guide uses to steer!