The traps are good, but your best bet is a very secure coop and run. Raccoons are strong and clever so hardware cloth with an apron and latches that the average 3-year old can't open are a good place to start. If you can do it a couple of strands of electric fencing works well for dogs and coyotes as well as raccoons. You may not get much in your traps until after the chickens show up unless the raccoons are already used to coming around to raid your garden, trash cans, bird feeders, etc.
ETA: You can't really get rid of them because new ones almost always move into the newly vacant territory when you kill the resident raccoon, coyote, or other predator. No matter how many you irradicate there will always be some sort of predator out there. I don't bother with premptive trapping myself, but I do trap and/or shoot the critters that are actively targetting my chooks. I know there are many more in the area, but as long as they stick to natural food sources I don't bother them. I'm not trying to talk you into doing it my way, I just don't want you to think that if you remove a few coons and don't get anything in your traps for awhile that the chickens will be safe and you don't need to bother with a proper run/coop.
What kinds of chickens are you going to get? I have a mixed flock of brown and green/blue egg layers. I couldn't decide on just one breed and since I don't plan on showing or breeding for anything other then replacement hens I indulged myself.