I just wanted to leave an update on the grub situation a year later. Seems they are a lot scarcer now after only using one treatment of milky spore. Funny thing last summer I even saw one grub on top of the ground running as fast as he could. First time I'd ever seen one do that and just thought to myself he must be infected. But not really sure.
I also used about 6 of the solar mole repellers and they also have seemed to help. Moles are still around but it looks like they migrated to the woods. There was one place I neglected to set up repellers and they totally devoured a couple of clumps of rhizomes. Will have to add more there when I replant.