Its all over, look on the right of way areas, where they mow, those are the best for cuttings, new growth 18" or better, nice and straight - there is a bunch on Hwy 12 west all the way out past Wilson from Menomonie as well. Stay away from the west south west side of Menomonie - thats all mine -- lol But you are right once you start looking for it you will see it all over, next you will start wanting the really red looking ones!
In a road side spot like that you can cut them fast.... I either direct plant them later or cut wax and bag them and plant them into a sand stooling bed for a year or two later to trans plant.
2-3 buds in and 1-2 buds out of the ground, Simple as that... dont over think it just go with the volume approach. Stab in and move on, or bed and lift later with root systems.