My husband is an ileostomate and he always uses either Irish Springs or Ivory soap in the shower. But, when his bag is off, he doesn't give a scrubbing to his peristomal area. What he does is just very gently wipe it, and let lots of water get on it. I'd be very careful about putting any soaps or scented products near that area, just because the skin is a little more compromised there than say in your armpit or back.
Ultimately you will find out what works best for you!