While trav­el­ers can cer­tain­ly sail to the warm climes of the Caribbean in 2018, there are a host of oth­er sail­ing vaca­tions in store as well. Experts see trends in sail­ing rivers, gam­bling, immerse expe­ri­ences, short hops and world-class enter­tain­ment. Fam­i­lies can trav­el to child-friendly spaces or book lux­u­ry cab­ins.