How long is he away/home for?
My Husband has been FIFO for over 2 years now. With travel he ends up 30 on 26 off. I can't give you any advice as a family, but for me personally (we are TTC).
I found to start with the first couple of weeks were the hardest, and then it was just easier from then until he got home. Each time did get a little bit easier, but it's always hard when stuff is happening at home, and you don't have that sounding board. To start with we skyped every day, texted. Then it kind of dropped back to every other day, and now we might skype every few days, and text every now and then. Just over time we had less "need" to talk every day. We cope much better now, but sometimes it is nice just to hear his voice.
I think attitude plays a massive massive part in how you cope. If you feel sorry for yourself and say it's sh!t and that you hate it, it will be much much harder to deal with than if you just accept it, and make it work the best you can.
It's great for me, as I can do the things I need or want to do while DH is away, and while he's home we see our friends together, spend quality time together, and in general enjoy each others company more. DH is always pleased to be home, but happy to go back to work, in a positive way, if that makes sense. I just have my own routine while he's away, and he slots in when he's home.
I can't say how it changes when you're a parent, but there are some Huggies mums who do it. A friend of mine's partner works on rigs/boats and he never knows how long he's away for, how long he's home for, she has a 3 year old and another one on the way, and she has no family in the country. She is my idol, she does fabulously, because she has the right attitude and has a good support network around her. If she can do it, I can too. And so can you =)
Good luck for everything, I hope you can make it work for you =)