There is a local civic event which many people in town donate their time (labor). Of course I was approached to tech the event (for free).
What I did with that local outdoor (festival) charity gig:
I donated my (personal) time ie; labor....but the event payed for the gear rental.
I submitted in writing my conditions plus the list of gear needed to tech a stage (everything; speakers, racks, mics, cords, patch cables, gaff, lights, etc.) plus a few rental houses in my area.
The festival was scheduled to run from 10:00am-10:00pm.
I included the following instructions: gear to be delivered (by the rental house) to the stage at 8:00am. I will set up and tech the event. Gear will be packed and ready for pick up at 10:00pm (by the rental house) after the fireworks.
When the festival committee checked with the rental houses as to the price of gear rental plus delivery/pickup, they called me back to see if I had the gear to rent = bingo!
Sometimes people need to be educated.
Mike M