I don't swap basses on a gig. I don't see the point.
As always, the audience gets me playing with my sound on every number. I don't believe they, or even most of the bands, are really bothered about the difference between my Lull P and Lakland. As long as it sounds good they are happy. I know this because I ask them.
I've done my homework and bought the best sounding gear I can find. After that I'm more interested in how[i] I'm[/i] playing than what instrument I'm playing.
I do get compliments on my sound and the current band likes what I do (again, I asked). I've been told to turn up and told turn down but, so far, no one has ever asked me to change my sound.