At this point in time, the only nocturnal daylily which I recall for sure having been in the Moon Garden (I'm sure there were others) was 'Bernice Loris'. I really liked that daylily at that time, BUT, the mix of diurnal and nocturnal daylilies just did not look good to me. In the morning, the diurnal daylilies looked great, whereas the nocturnal daylilies were on the decline. By afternoon the nocturnals had to be deadheaded, yet the new blooms hadn't opened up yet. It was not a good combination. Since that garden area had to look good all day long, I ended up yanking out 'Bernice Loris' (and any other nocturnals).
Right now I am considering what daylilies to remove and replace in the Moon Garden. I bought a plant of 'Luna' several years ago almost soley for the name (though I knew that the color would fly in the Moon Garden). The flowers bloom too close to the top of the foliage for my liking (I don't know if that is true for anyone else, or if it is just due to bad culture), so I am thinking of punting the plant.
I am also trying to consider what shapes of daylilies I want in that garden. Right now I have a combination of rounder blooms ('Sacrament of Healing', 'Spacecoast Cream Supreme', 'Winter Wedding' (which I will probably sadly remove as it has foliage issues), and 'Tuscawilla Tranquility') and narrow petaled blooms ('White Stripe', 'Gadsden Icicle' and 'Luna'). If I take out 'Luna', that leaves only 'Gadsden Icicle' and 'White Stripe', neither of which I want to remove. 'White Stripe', however, is off to one side, and is really a specimen in its own right (because of the variegated foliage). The odd daylily out would be 'Gadsden Icicle'. Perhaps I need to move it into 'Luna's' spot (which is off to the other side a little bit) and then back fill that spot with a rounder flowered daylily (I have several sitting in pots). That might work. Hmmm....
For what it's worth, I am not against nocturnal daylilies... they just have to go well in whatever garden spot they are planted, and not obviously be a mess during the day. I bought a plant of 'Tetrina's Grand Daughter' last year. It is still sitting in a pot in my nursery area, as I have yet to figure out the right spot for it!
I was then requested by one of the forum members responding to that (site forum) thread to start a new thread, on the topic of Moon Gardens, over in the perennials or cottage garden forums.
