want to hold them longer? Roll up, fur side out, freeze, pull out dip in water, back in plastic bag and refreeze. The layer of ice staves off freezer burn. Another way is vacuum bags.
Better raccoon trappers then me on here but set those cage traps near their trail, cover floor and put something against the back and sides to keep them from working the wrong end of trap but nothing on top of trap.
Bait with a smorgasbord of goodies if you can. Cats around stick to peanut butter and sweet smelling lures with marshmallows for eye appeal.