Santa just breaks down the doors of those homes without chimneys like a boss. He steals all their s***, while leaving a picture of his a** behind saying "Kiss it." Oh wait...that's what i do every christmas eve. I forgot. lol (joke)
As for the jolly old bastard saint nick, isn't he like magical and crap? So can't he like just teleport or something? I mean if the man has the power to manipulate time to deliver toys in one night, then teleportation should be easy. anyways that's my two cents.