We have a live trap and the only thing we've caught in it so far is our cats a couple times and two skunks. Still hoping to get that racoon! My tip is thus: whatever bait you put in, make sure they REALLY have to get in there to get it. So, don't just throw a few marshmallows in and call it good. I never caught anything until I put an almost-empty peanut butter jar in the trap.. that way whatever gets in there has to really get in to see what goodies are awaiting. I had a basic bowl that we would put various treats in (tuna! sardines! marshmallows!) but the trap was never triggered and the food was gone in the morning. I think it was just reaching over and grabbing it.
If usining a cage trap build a small "bait box" out of hardware cloth or use a wiffle ball and tie it to the trigger or hang it from the top of the trap both have worked for me