Relocating Feral Cats

I am currently feeding at least 10 cats.  My neighbor is complaining that they are pooping her yard.  I have put out litter boxes; however, the problem still continues. I'm planning on trying to trap them and get them fixed, but I need to relocate them.  I have made several attempts trying to catch the "momma" cat but no luck thus far.  I have trapped and released in the past and still have a few of these that come back around every so often.  This is tearing me up as I love cats but it's really getting out of control as the cats are basically swarm you when everytime they see you.  3 of them you can actually pet and hold; however, the rest you cannot touch.  I have checked with the Humane Society and they will not take any of them as they have not "lived" indoors.  Does anyone have any suggestions on relocating them?

I'm bumping this up so that other members see it.  Hopefully someone has some ideas for you.