Raccoons fear big cats. This DOES WORK, had raccoons living in my attic. Go to you local zoo and ask if they give or sell urine from the big cats, when they spray out their pens. If not, the next best thing is to take used kitty litter (as much as you can get from home and friends) and continue to pour it around the areas they stay, as well as the perimiter of your property. Ya, this sounds (and smells) yucky, but the problems from raccoons are much worse.
I found live traps do not work, since raccoons can be very intelligent when it comes to getting in and out of places.
Dogs help to scare them off, but any injury to your dog could bevery painful, vet expensive and even fatal, from all the decaying ??? under a raccoons claws.