I don't envy you your battle, Rob.
We've recently started laying down landscape fabric in a few areas where we are constantly battling weeds - covered with mulch, of course.
Some years ago I tried the corn gluten, but it does attract and feed wildlife. I saw some visiting ducks eating it, and I was warned by somebody that the rats would eat it too, so I just gave up on it. So here I try to pull weeds out by the roots. (Garden helpers merely hoe, if that... which is not of much help.)
