I love, love, love daylilies. I always tell new gardeners to get them. They are utterly foolproof -- no diseases, grow in shade or sun, a mind-bogggling array of colors, drought resistent (well fairly drought tolerant), no insects. Is there a more ideal plant? I don't think so. Perfect for a low-maintenance garden.
I like to tell people that you could run a steamroller over them and they'd survive.
And the wild orange ones are perfect "space fillers" in the garden. Whenever I'm starting a new bed and need something to fill-in and grow quickly, they fit the bill. They grow rampantly, and by the time the less vigorous plants have grown, I just take them out and give them to someone else. Or I start a new bed.
If you need a good source, try googling Gilbert H Wild & Son(s?). What an asortment. Being cheap, I usually order only when there's a sale and get daylilies for $2 or $3. Needless to say, I've been getting mine from them for years. Okay, decades.