Thanks all! I think he is quite the handsome man too! He did take the bait, and he is covered up in the basement until morning when I'll take him in. I thought he'd outsmart the trap, since I watched him trying his best to get the food through the bars with his nimble little paws. I was sure he'd set it off accidently, but eventually, the lure of smelly sardines was too much and he went in.
I saw a new cat tonight. The trap and food/water/shelter area is in view of a window. If I turn off the lights in that room, I see the cats, but they aren't bothered by me. He/she was a black shorthair with a very cute, round face. I put out some wet food for the kitty and retreated to watch. Oh boy was that cat nervous, but beautiful, and in need of a good meal. So hopefully I can also bring that kitty in for TNR.
Edit: Interesting and funny thing just happened! A housemate came home, and was looking out the kitty window. The new black kitty was in the process of stealing the sheet covering the trap! Dragging it through a gap in the fence. Since I didn't want to loose the sheet, I went outside and retrieved it, and pinned it down with a few heavy bricks. Henchka yowling at the other cat is what drew of my housemate's attention to the sheet theft! I wonder if that black cat is a female, and was looking for nesting material?