I always bring my rig to gigs and then decide if I´ll use the provided backline or my own stuff. Since I´m a soundengineer, too, I never had a problem to communicate my needs to the local crew. In the end it´s just plugging an XLR from amp 1 to amp 2 DI out and backwards. I´ll do that for them and all is good, no more additional work for them, no complaints.
In my own location I have a Boogie Prodigy top + Powerhouse 4x10" as well as a rack with Sansamp RBI preamp + KMT DC3 poweramp + 2x EV15L (TL606) cabs as 2nd choice. This is clearly a serious kit. We had a few bassplayers in that were not happy, though. It always turned out that they were idiots and had no clue about sound.