A friend of mine is a trucker. He used to spend weekends at home and go coast to coast during the week. He now spends one week at home then three weeks on the road. He has a wife and two daughters.
Another guy I know came here with his wife and two sons about 10 years ago. The wife and the kids went back to their home country after few years. He spends 8-9 months trucking in the US (lives in the truck) and 3-4 months with his family.
A cousin of mine has been working on oil drills (Middle East, Africa, Northern Sea) for almost 30 years. 2 months at home, 2 months in the field since more than 20 years ago. They have one kid. They wanted to have more but he lost fertility along the way.