I try very hard to maintain a balance between a busy family life, community service, and my business...and it certainly isn't easy.
My clients tend to need flexibility from me, and I doubt that will change. As a result, I tend to work alot of weekends, but try very hard to ensure that I've made time throughout the week to keep things in balance.
I am reasonably successful in this regard when it comes to my "nuclear family" -- but I don't quite manage to spend enough time with my step-sons (who we only have on every other weekend). My community service is (mostly) manageable.
As my business grows, I expect to be able to depend delegating some of my weekend work activities to my employees. That's the plan, at least. Ask me again in a year's time.