I hope it's OK that I post here...I feel a little tribeless, sort of between "working" and "sahming." I work a pt position, a job that would be career-track if I were ft, but I only work hours that are "invisible" to my family, i.e. hours that don't require anyone else to make my working possible. Usually around 15 hours a week or so, and my kids are in school during hours that I work.
Anyway, my dh works ft. When he is working at the home office, he is usually out of the house from about 7a-4p or so. But he also travels, anywhere from 1 week to a month at a time so far. He's typically gone about a third of the time, I'd estimate. It's really, really hard after the first week or so.