Super post, great suggestions
I am organic grower also. Here we have fire ants whose bites are toxic, painful and potentially dangerous to humans and vegetation, decimating plants in a short time span. Yikes!
Our solutions include cinnamon powder (cassia) as a barrier. Sugar and Boric acid powder mixed (dries them out from the inside and non-toxic to humans) when you wish to move their home away from human working and walking traffic areas