Oh good lord, somebody mentioned RATS. I don't even want to read the word. Well I heard the raccoon a few nights (I remember what they sound like from childhood), so I figured it was still the coon coming, but who knows. Great suggestions -- thank you everyone.
Apparently (so said the hardware store guy who sold us both the chicks and the trap), our city requires some kind of trapping license if you do this yourself and are foolhardy enough to alert the authorities. (Also we are not certain of the rules on chickens here and are working on a 'don't ask, don't tell//pay the neighbors off in eggs' philosophy.)
He recommended drowning the trap and the raccoon inside. However, we are trying to do this with as few casualties as possible, haha. I find it hard to even get my arm inside this trap to wire the food...but will try again and use firmer bait, cover the trap, weight the trap and hope for the best.
I appreciate everyone making time to offer suggestions. Thanks again!