Sorry for your raccoon issues.
Here are a few more ideas for you to try. One is for such as Deer, Mice and Squirrels, but it is cheap enough to try for Raccoons...
Buy some Irish spring
bar soap and use a grater to grate it on the area you want to keep the Raccoons away from. The smell is offensive.
Another is that you can also build a SOLID fence around your gardens. BUT I would not make it very short, so to keep them from going over top of it.
We have a other members that also live in Canada, so perhaps they will come along to give you some help.
I wish you all the best of luck.