I can't speak for the whole of WBCCI. I can't even speak for everyone in my Unit. But I know that WBCCI has a "Family and Youth" standing committee, whose brief is, in part, to ensure that WBCCI events include family-friendly activities. And on the local level, once you join, you'll be able to ask event organizers to include family-friendly activities; they may turn around and ask you to volunteer to design those activities, though.
Don't let a relative lack of WBCCI members with young children scare you off. Don't let yourself be trapped by the the circular argument that "People with children don't join because there aren't enough members with children." If you join, there will be one more family in WBCCI with kids than we had before, and the next family with young children will be that much more willing to join.
Besides, there are plenty of members who have young grandchildren, who are every bit as interested as you are in developing more family-friendly activities at WBCCI events.
As long as the kids don't chew on the shore power cables while teething, I'm sure they'll be welcome at just about any WBCCI event, any time, anywhere.
Engineering: Finding complex solutions to simple problems you didn't even know you had.