hey, I didn't know you had a cham! I don't recall seeing you on
the cham forum! What do you have?? I have a 2 y.o. veiled named Luna (can you guess how she got her name
)
OK, now to Leps...the things to keep in mind are that they need to hover in order to feed b/c their proboscis (tongue) is so long. I am not sure if your cage has sufficient room for this. I also am not sure if they will nectar on daffodils - but I am sure your selection is limited this time of year (you're in OR or WA, right?)
here is info from Moths of NA website: Adult food: Nectar from a variety of flowers including columbines, larkspurs, petunia, honeysuckle, moonvine, bouncing bet, lilac, clovers, thistles, and Jimpson weed.
as soon as they have mated I would release the male. I do not believe the female will still feed once she begins depositing eggs (prairiedancer may know differently). She will deposit all her eggs within 24-48 hours. Better yet, is keep an eye on her and once she has laid a sufficient amount to provide me, pd and yourself (lol) then let her go to carry on her genetic diversity 
hope this helps! btw, I saw your post below just today and replied
your thread