I have the x-large Bummis tote that I use as a pail liner - I never have a problem with the smell. A large will work in an 8 gallon pail. I also have an air freshener stick up thing in the bottom of my pail so when I pull the liner out, the pail gets a bit of a freshening up. I usually wash my liner about every third diaper wash day.
HTH
HTH