All depends on how strong your relationship is and how much your partner believes and supports what you are doing. And with starting a family, a lot of it depends on how strong your family support structure is?
Any cracks and aviation will out them. A lot also obviously depends on you as a person and how you handle being away? If you can't go 5 minutes in a hotel on your own without skyping your nearest and dearest, then you know it's probably not for you.
In short, you need to have strong support.