Lots of negative posts, but there's nothing so negative as having to sit at home when you could be gigging.
If you have trouble with the dep then you've chosen the wrong guy. [i][b]Don't choose the wrong guy[/b]![/i]
If the band is so inflexible that they can't accommodate some "differences" in the way their songs are played then they really should be getting out, playing with other musicians and working through this inexperience.
I know good deps. This Saturday we are a scratch band of guys who know each other but don't regularly play together. We have a set list from the singer, we know what we should be playing, we've done our homework and it's going to be a great gig. This doesn't happen over night but with experience anyone can make this work.