The 84M-strong Millennial Nation is hardly the widely assumed "adventure-driven generation" when it comes to making travel plans, according to the 25th annual "Portrait of American Travelers" report released today by MMGY Global.

Peter Yesawich, MMGY vice chairman, briefed a dozen travel writers/journalists (and yours truly) on the survey of intended travel at the PR firm's office on New York's Fifth Ave. The survey only covered the half of American households that travel.

POAT found that Millennials (born 1980 to 1997), top GenXers (1965 to 1975), Baby Boomers (1946 to 1964) and Matures (1945 and before) when it comes to "staycations."

More than half of Millennials (55 percent) are interested in taking a vacation at a place close to home. That's up 14 percent from 2014 and 23 percent in 2013.

Top three reasons for travelling a short distance and staying there are to relax (37 percent), spend time with family/friends (34 percent) and save money for another trip (30 percent). Yesawich pointed out "relaxation" is the No. 1 reason people in all segments travel.

Young families are more apt to go on a vacation than millennial couples by a 43 percent to 27 percent margin. Millennial families will spend an average of $6K on vacations over the next year.

MMGY's survey also found that Millennials have caught the cruising bug. They tie Matures at 51 percent when it comes to interest in taking a cruise during the next two years. Yesawich said Millennial interest in cruising fits well with their desire to explore new places by waking up at a different location each morning.

Social media, of course, plays a big part in vacation interest by digital native Millennials. Fifty percent of Millennials use social to share travel experiences with others. That tops scores generated by GenXers, 35 percent; Boomers (19 percent); and Matures (9 percent).

Millennials take top honors (36 percent) in the category of sharing vacation photos on social outlets like Facebook "to make my friends/family jealous."

GenXers (26 percent), Boomers (15 percent) and Matures (7 percent) follow Millennials' need to stir up the envy pot.