Look at the mixing ratio, your heart rate will go down. LOL!!!
Baby's breath is a nasty one. I would try Plateau/Tordon mix if you can spray Restricted Use. But be careful, that mix can produce scorched earth. Maybe start with 2,4 D? I've never tried milestone on it.
Alot of times the issue isn't your property, its everyone around you. Tough to manage for weeds when you are surrounded by the stuff.
So basically the consensus is milestone. I was planning on trying to get one of those tow behind rollers to eliminate the "drift" with a pull behind sprayer. Assuming I get that and use milestone I should be able to roll right along the edge of the weed mat without affecting the trees correct? Trees are 1-4 years old and there's probably 1000k+ of them