I would be put off if I couldn't get to the base (or the place of work) easily, as I don't drive, and transport to my town is expensive and unreliable.
If I saw something about lifts being offered, or if there were an admin role that I could do from home, or from a very central base I would be happy to volunteer. I looked into volunteering for refugee charities and came upon those barriers with that, and I have skills that (I think) could be useful.
People eating and drinking on the go