Re: How young to start?
out of diapers = in the woods short walks , fish a bit , let them chop down a tree ,make some kindling (I bought a pair of cut proof gloves to get them started) make a shelter (tarp and bush).
anything to keep their attention. make it fun for them when you think you have enough snacks bring twice as many and be ready to spend a unexpected night out in the bush(even consider doing one overnighter without them knowing its going to happen)
and sorry but I gotta say what everyone else is thinking consider trading in wife for a nice rifle.
a bad day hunting is awwwwwwww who cares as long as your hunting.