Send them to Doug . We vacation to the popular places in the off times. Our vacations are in the Spring or the Fall, very seldom in the summer. Here's a tip. Find out when school is in session at your destination and travel then.
Nothing is worse than a vacation spot crowded with squalling brats.
Leave 'em home. You all deserve a break from each other. Avoid those areas even if the travel agent did not sell any trips there. Chances are that people will still frequent those places without the services of the agent. When my wife and I went to Barbados last summer, I photocopied our passports, airline tickets and wallet contents.