I have used the shiney foil on my pan quite often by its self It's a fair set but when you have a attrictive oder nearby that they can't see that is the clincher here.the paws start going all over the place trying to find the source.
My best set using this methoud is a trap just infront of a flat rock that sticks out of the water about 2" the rock is smeared with shellfish paste or oil that cant be seen! If it can be seen then the coon work the bait not the trap.I should of added that the trap is also under water.