Transplanting a Seattleite

I'm trying to imagine the kid strapped into a carseat which is then strapped to a rolling piece of luggage... does the seat have wheels? Or is the kid tilted back?

I've done my share of schlepping about through airports and on planes with two kids in tow, sometimes alone. This Christmas was the *first* time we checked both car seats since Ave is nearly 4 now. I would formerly use the stroller as a luggage cart on which one car seat would be mounted with one kid strapped in. Other kid would be walking or back/frontpacked while I slung the tether strap of the Britax over one shoulder. Can I just say, if managing to actually get through airport security with kids in tow, alone, with car seats does not qualify one for superhero status, it will, at least, give one a hernia.