Halloween?

I am going over to my Aunt's(She is a widow with a couple medical problems) to help her out with Halloween. She lives on of those streets where she gets bombed with little Candy seekers(We had to use over 12 bags of candy last year!!) Yet, since then, she got two dogs, and I have mine, which I am bringing over there so they can have a little play date. All three of them are Shih Tzus, Her two, the oldest, are little over a year, and my little one is 7 months. All three of them are very overprotective of their "territory"...And when the pizza man comes, they go ballistic! This is their first Halloween, so we are both at a loss how to keep them contained without them getting out of the house, scaring the children by barking, getting out and biting one of the children's feet(They haven't done this before, but we are unsure of what to expect) or stealing some Candy and ending up in the EV...