|I wet pailed for about six months, and am so happy that I switched to a dry pail. I really don't think that wet pail makes diapers stain less, at least not with the bf poo I was dealing with. I tried to switch once but wasn't happy with the way the diapers smelled. When I tried again, I added in the pre-rinse/wash that everyone recommends, and that was it. *Much* easier, great results.
I use a mesh liner inside of a plastic pail, but that's really a function of when I had a front-loader with a very small opening (couldn't fit the pail in to tip it out). I rinse out my pails and squirt down with vinegar. Sometimes I'll put them out in the sun to get those great UV rays, but generally I don't bother. As Karen said, really the only time you'll smell your pail is when the lid is up and it's getting to be wash time.