No, I think you've thought it through pretty well, Shosh.
We have used Cascadian Farms cereals in the past-- the granola in particular. But then DD developed an almond allergy, so a lot of things that were more or less peanut-safe became more questionable for her. Especially after she reacted to some soy milk on a shared line, and to an Amy's product made in a shared facility with them.
So yeah, with peanut and milk, but not almond, allergy, it sounds like this may be among your lowest risk options.