When a team travels out of state to a competition that takes 48 hours from the time they leave campus to the time they return, that is 48 hours of working. The same goes for traveling to a big high school meet to recruit that may take 24 hours from the time they leave campus until the time they return. That's 24 hours of work. And much of this time is over weekends. All of that is time they can't be on their own personal time, with family, and all of that is time they have to be "on." Therefore it is included in some of these "60 - 70 hour work weeks." True, that's not every week, but during track season, when we may have athletes competing just about every weekend, often far away from home, those hour estimates are VERY accurate.
I realize this travel time may be less for DIII programs, but many DIII coaches have other duties on campus included in their job description, such as teaching a class or working for campus rec. Sure, this may not add a ton per week, but add that during a busy track season while they're trying to finish up their recruiting class of slow crappy kids no one else wanted and I don't blame them for not going that extra mile for the 25K/year they're raking in.