I usually wear a fire dept baseball hat and one of my fire dept coat, jacket,or shirt plus I have a wallet badage has a life member and my county picture ID and state EMT card. My van has a state issued FD vehicle tag and the assorted bumper stickers.
I forgot my fire/rescue hi viz traffic vest that I keep in my van. I also keep hi viz medical vest, pants, hat and a old fire helmet I keep in the house in case of something happening near the house. I have medical bags in my van, the house and at work.
I also have my set of turnouts from my station (PBI) I keep in the van and a personal set I had for extra gear for years (Nomax).