I've come to the conclusion that a smaller pack is a lighter pack, so I'm trying to go from about 4500 cubic inches to between 3000 and 3500 cubic inches (the Osprey Talon 44L pack has my eye, but I need to go to a store and load one to see if it would work).

I don't think I'd be able to support children's equipment requirements from that small of a pack, so I think I'd need to keep the big Kelty Super Tioga pack for at least the next decade. Of course, multiplying packs creates household space issues as well.