Cat, are they in the middle of the yard or on the edge of the yard? Depending on where they are, you'll have different options. Also, depending on how big they are, it will give you different options. If they are large, you can treat them like an island, with tall daylilies in the center, and shorter ones around the outside. Also, do you hybridize? If you do, it would be easier on you if you put tets together in one bed, and dips in another.
I can't wait to see what you come up with! I know it will look fantastic!