How do I explain this life?

How do I explain that I don't know where I am going to be from week to week? That I'm away from home most of the week, and that when I come home, sometimes I just need to sleep. That even when I'm on the road, it's almost impossible to get five minutes of privacy for a personal call during the day. Sure, when you're in your late 20's, just coming out of b-school, this job is probably good, its probably fun to travel, collect millions of mileage points, and build up the resume. But me, I'm 41 for Pete's sake. I love to travel, but after the first couple of weeks on an assignment, I'm missing my bed and resentful that I don't have any say in most aspects of my life Mon-Thurs. That being said, I've got a good life, live in a city I love, work with wicked smart people, and like the work itself. Quit ya bitchin' and get to work.