The Daryl/Nate combo has been the most problematic I'ver personally seen and experienced. With that combo I'd do this:
-Do your rim strip and tape as if you're going tubeless that day.
-Mount the tire on the wheel using a tube.
-Leave it mounted with the tube for at least several days, RIDE IT.
-Break the bead on one side and yank the tube.
-Insert stem, finish your tubeless setup.
If you can't or don't want to do that, make sure you have a strap handy to wrap around the tire. Even then, as I experienced trying to setup a Nate on a Rolling Daryl a week ago, it may not seat. It just simply would not budge.
This sounds like a reason to get together and drink a couple beers at AG's to me.