"Stay close to mom and dad or friends," CPD Lt. Mark Camp said is one thing children need to remember.
Also, keep a flashlight handy and never go inside someone's home -- always accept treats at the door.
Another thing to keep in mind is that, although this is a planned event for the downtown area, the railroad system does not stop for the trick-or-treat.
"Be careful around curbs and the railroad tracks," Camp said. "Masks make it hard to see left or right and up and down so it is very easy to trip and fall."
Watching for tripping hazards is a good idea anywhere as light cords, garden hoses, lawn decorations and sprinklers may be unnoticed on the ground.
Costumes are an important element to the celebration, but there are a few things to note when choosing the right one.
"Be careful not to wear a costume that drags on the ground," Camp said. "It can get caught in the feet and cause a child to trip or someone else can easily step on it and make a child fall."
Costumes often are made of material that can easily ignite in flame. Parents are encouraged to make sure the children know how to stop, drop and roll in case the costume does catch on fire.
Pets, though often good companions, are advised to be left at home.
"For the adults, leave pets at home," Camp said. "Unless you have a service dog, it is not advisable to bring dogs out with all the children and traffic."
Between the excitement of the event and a sugar rush from the treats, children may be eager to rush to the next stop along the way. However, CPD advises that the sidewalks will be crowded.
"Take your time," Camp said. "Don't run."
When receiving candy, the department also advises not to eat anything until parents and children have returned home and had an opportunity to inspect the pieces. If anything seems suspicious, or if a wrapper is open, or if anything is received that has not been wrapped, CPD says to throw the piece away -- do not eat it.