Personally, I don't like using marshmallows. They can be a mess and they have virtually no scent after a few days (maybe hours). If it's cold/rainy, they're done. If it's hot, they're done. I prefer golf balls (only in the back of the trap).
Maple syrup and any (legal) fish/shellfish for bait. Sometimes a can of sardines (or two or 3 cans) wired up to the top in the back of the cage is good because the scent travels and it also provides some visual attraction.
If you're having a hard time getting them into the cage, try a bottle of Clam Juice from a grocery store and dribble a little of that on the ground leading them in. I've caught them in beaver sets so I know they are curious about the scent of castor. Maybe try some of that. Just a little bit.
Coons love to pick through the side of traps and grab the bait. If this happens, bury your bait and put your cage over that (similar to a dirt hole set) and just put some call lure up above your trap on a branch to bring em in.
I don't think you need to cover the bottom of a coon cage. They don't care about that kinda *censored* if there's food involved

WCO job on Lake City Way, 40 lbs each.

