Sure there are bike vacations, and perhaps we can make them a little more popular. I'm not going to take my family on such a vacation: most of our vacations are visiting grandparents. With a car and modern freeways we can make the trip in 21 hours of driving (split over a few days - we try to visit some other uncle along the way), few people get enough continuous vacation to bike that far. If flying wasn't such a hassle I'd probably do that instead (driving is cheaper)