When you play out of town consider involving community radio. Usually it’s free and then there is some built in advertising. Don’t be scared of asking they are suppose to represent the community after all and you are keeping their work stimulating. Offer to make the advertisement yourself because it will be a more amusing ad.
There are too many scenarios where the club doesn’t call back, where the car breaks down, where the crowd is the wrong crowd at least have fun with the things you can control. Maybe there are a few artists who are successful zillionaires in their field but most of the other artists hover around the poverty line. There isn’t much of a middle class in being a performing artist. That’s why the #1 rule in my delusional universe is keep your dignity.