We did the same thing a few months back for our K9 unit/SSD K9 Association and it was hugely successful. Get your handlers to bring the dogs out and have them run with them (if they are social and dog friendly enough). People love the dogs and seeing them interact instead of just hearing stories, many of them of the negative kind, goes a long way towards public support and donations.
Is there a way those of us out of the area can donate to the unit?
Best of luck and stay safe!!