Thanks, all! Mine is a colostomy and I use a drainable two-piece Convatec system--a wafer may with luck last a week but never more, and I change pouches twice per wafer or every three or four days. I'm interested in the reference to a protective patch for the filter because my supplies do not include anything like that.
Also, I've tried the freezer bag trick three times now but it always seems to slip before I'm done. Do you have to tighten it up around the underside of the flange? Maybe I shouldn't be trying to use the one with the handle on the zipper (Hefty bags) since that seems to get in the way... When things do get a bit wet, I stand in front of a fan or use a hair-dryer on lowest heat.
Since I live on the Texas Gulf Coast (between Houston and Galveston), right now I'm glued to the news because I may have to evacuate Hurricane Gustave in the next couple days or if not, bunk in a health care facility that has generators and extra cots, since I'm obviously not yet fully adjusted to ostomy maintenance. (In 2005 I was in New Orleans when Katrina came and had to evacuate with the natives. I got home and two or three weeks later had to evacuate before Hurricane Rita and was away for six days!)