Colossians 3:17 — And whatever you do, whether in word or deed, do it all in the name of the Lord Jesus, giving thanks to God the Father through him.
Colossians 3:23 — Whatever you do, work at it with all your heart, as working for the Lord, not for human masters,
I think that a poor idea, WRT any sort of witness.
Sue them if they don't pay.
Certainly an option.
Take the booking and call them the day before with a family emergency.
But does that mean to take great photographs or to do a great job of resisting the evil of the far left? I'd incline toward the second option - decent people do not celebrate perversion.