Fireworks can cause wildfire rack card
This 3.66' X 8.5" Rack card says "3.6 inch wide by 8.5 inch tall rack card; Fireworks can cause wildfire printed on top next to a picture of a rocket with flames. Fireworks prohibited on all Federal and State public lands; Black flame bullet points with: Discharge Season, Legal Notice, Buy it here, light it here, Be ready and report all wildfires." It can be printed 2 sided and could be used as a door hanger with some manipulation.
Can be printed 3-up on 8.5x11 and trimmed for in-house reproduction. You could a second page to print on the back, with additional information.