Register and Join in the Fun.
Never go out alone. (Who does anyway! Imagine having NO friends to go out trick or treating with???)
Carry a flashlight to help see in the dark and help drivers see you.
You might want to put in something about making sure any mask you wear does not interfere with your vision.
Also, I've heard be sure you don't wear long robes, capes, or dresses that you might trip on.I think I might make clothing all one big thing:Clothing that is visible to others and safe for you.Something like that.
What if someone invites you into their house?