Having traveled with our 5 kids (at one point having 5 teens), I was amazed at how often I ran into them on cruises, there really is a finite number of places for them to be, so I could easily find them. On our last cruise they were 14, 14, 16, 19 and 20, so the older 2 stuck together and met other people in spite of being too old for the club (they were concerned about that). When they’re out and about at home, I just need to trust, on a cruise I see them all of the time. Fortunately we live in the same town where my husband and I grew up, lots of families have strong roots, so eyes are everywhere.