Both of the cats are already declawed (front paws only). They both have rear claws.
One of them is very skittish about new people/animals. (She was an abused cat when we took her in, so she's not very trusting.) She is indoor/outdoor; we think she might start spending a lot more time outdoors. The other one is indifferent about most everything. (He has a history of marking, although not lately, but otherwise is fine.) For the most part, they're both good cats.
We are crate training, due to the overwhelming encouragement we've heard about it. We are also looking into good obedience classes now.
My sister in law has a year old St Bernard who was at our house for the better part of a day a while back. The cats behaved alright for him, (which is where she got the leverage to break me down).