First, CowboyCO, I do know that it works both ways, and the one working is crazy tired and torn too! I hope you can find a balance!
To the OP: I'm there with you! DH got a promotion a few months ago, which is good, but he works nearly always. It will be that way for about a year I think. My only saving grace is that I have family nearby, who help me. But even with that, it can get very stressful and tiring (my baby gets up every day before 5 am, and it makes me crazy tired). So I'm up at 5 am and go all day until 8 pm alone with the three kids most days. DH truly tries to be there as much as possible. He tries his best to take his days off, but then he's tired too, and needs to relax, which I understand in theory, lol.
One thing that helps me is to take pride in the fact that I CAN do it, and do it with at least only a little resentment.

I try my best to be supportive, because DH doesn't need to hear how bad it is for me constantly, when he's working his you-know-what off for us. I know several friends of mine couldn't do it. Some have tried, and made their husbands miserable by not supporting them, causing lots of tension. I take pride in the fact that I support my husband the best I can.
As for the kids, the older two are old enough that I can explain that if Daddy didn't work really hard, Mommy would have to go to work all day too, and wouldn't be home for them. Which is true. We sacrifice a lot (including DH working lot of hours) so that one parent can be home full time. The kids love that, and don't want that changed. Plus I tell them that Daddy misses them but has an important job (to make the kids feel better about it). On the days DH has off, I try not to schedule anything and let the kids play with him. They go to his office sometimes, and email him during the day.
It is a bummer, and I wish he could work less and still pay the mortgage, but we live in an expensive area that we love. Anyway, I certainly understand! Try not to take on too much, and good idea getting the pre-made cookies!