P.W.
Get help. If you can afford it at all hire some help, whether it's with the house, with the kids or both. Give yourself a break.
If you cannot afford it then recruit friends or family. I'll keep your kids for an hour if you'll keep mine for an hour.......etc...
Let go of perfection. A dusty house or clutter is not the end of the world. Don't try to do it all.
My husband traveled too HAP. He is a wonderful husband and excellent provider. He did his best to be "present" but there were many times he just had to be away or working. Sometimes I felt downright abandoned on top of being overwhelmed. My husband and I talked about ways he could feasibly help, and I hired a housekeeper. I joined a womens support group that met one night a month and a bunko group that met one night a month. (If you can't join one, then start one) My husband made it a priority to not travel on those two nights. Occasionally I had to hire a babysitter or impose on my mother or sister when he just had to be out of town....... just do what you need to do to take care of yourself.
Or email me. I really get it!