I was asked today to sit in on bass with a local, established blues band for an upcoming blues festival. Their bassist is going to be out of town, and they are booked ahead of time, and I am friends with a member of the band, so he asked me. Ive never played with a blues band. Ive played in some bands that did rockabilly, country, and rock. My area of experise is playing "country rock", which I consider Gram Parsons, The Byrds, and lots of stuff like that. I do lots of walking bass, but never the blues... I am familiar with the I IV V and will have no trouble with progressions. I am just thinking my walking lines will be too boring and predictable. Any of you guys got any advice or tips?