I agree with singing tree about the banding. She will look natural and yet prepared for the show (vs leaving the double mane)
Lattice manes are really pretty but will probably be frowned on at a hunter show (even if it is small). The whole braiding tradition came from keeping manes out of the way when the hunters were galloping/jumping across the countryside and a lattice braid doesn't even pretend to do that.
Running or french braids are nice (and quick!) but it's best to do them as close to the last minute as possible because they pull out and get "wrinkled" fairly quickly, especially if the horse puts its head down to graze/eat hay.
Good luck at the show!! Can't wait to see the pics!
