I wear a two piece, too, LOL~Ron and Allie!
The Coloplast Assura Extended Wear wafer gives me a week's worth of wear, and I change the pouch every 3-4 days.
The best deodorizer I've found are the Hollister M9 drops. A few drops in the pouch, and there's no odor at all!
Dx'd Crohn's in '99 at age 28. Proctocolectomy and permanent ileostomy in '06.
Disease-free and medicine-free since surgery and very thankful to be healthy again.