You may want to get vols to sign waivers as a CYA. Something along the lines of knowing the risks but are continuing anyways. Also, see if some organized group (Boy Scouts, etc...) may want to pitch in. A little PR goes a long way in the community.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)