I have a Smitty's L'il Hauler wagon too, plus the pup trailer and I use luggage straps from the dollar store to keep my kiddies contained. They despise it, but it totally works. It's a heavy wagon on it's own, so I only pull everyone all at once if I really have to. There's no reason why the walkers can't walk around my neighbourhood. Especially with all this beautiful weather we're getting