Just do a search. This has been covered many times. If they are already coming there just put some corn in the trap. Looks to me like you spent too much money already. That door is $300!!! Just make a door that they can get under going in but not out. Seems to me you are way over thinking this. But you can use the fancy door if it makes you happy and the fancy bait too. I will stick with the cheap stuff that I know works.
I am sticking to the cheap stuff too... notice I said hog slammer style door.... I built mine from scrap angle I had left over from another project. I used hinges that came off our front door when we changed it out and two $4 springs. I already had the panels and post.. the molasses was left over and the corn was $10.. add in $5 for welding rods and $3 for gas in the welder..
It took me about 2 hours to build the slammer door, and about an hour to set this thing up.. What makes me happy is knowing that i didnt spend $250 or more on a trap.
