You can probably rent or borrow a trap from the Humane Society, and after you trap the cat, take it to the low-cost spay and neuter shelter or clinic in your area. Keep the cat quiet for several days, and then release it where you can care for it. Some people are fortunate enough and patient enough to make house pets out of these feral cats. In addition, some are strays, and will be easy to tame.
The bait should be very strong smelling cat food, such as fish. It's best to put the trap in the bushes, and make it as natual looking as possible. Of course, most of that information is in the sticky.
Stay close, and have the shelter or vet notified that you will be trapping a feral for TNR. Don't allow the cat to see you. Throw a large towel over the trap to keep the kitty calmer, and take him asap. This trapping can be quite traumatic for the cat.
It's best to get the cats used to a regular feeding schedule, and on the day before the trapping, skip a mean, so the cats are hungry. Of course, with help, you might be able to set a couple of traps.
Good luck, and thank you for caring. Keep us informed, please!