I've actually done a bit of research on this (thanks, youtube!) and talked to quite a few people in the area (I live in hillsboro area). The one thing I have found is that you want greasy. Anything greasy. Hot dogs work well, chicken thighs work well, but anything that has really good grease on it will do you well. I've taken to buying bait on my trips to the beach fishing for surf perch and then bringing it home and letting it sit in the back of my truck in the sun for a day. The smell generally makes a dandy of a mudbug enticer!