Found it Mel. You are right of course, it is a moth.
Orange Spotted Tiger Moth (Amata annulata).
About the butterscotch smell, to me it smells like butterscotch but to hubby it smells like vanilla. Someone else said it was like strawberry. How about that!
So who knows what it would smell like to you. What an amazing plant. I see so many different insects on it. Bees, wasps, butterflies, moths, beetles --- all crawling all over it like they are enjoying it. Nothing eats it, no diseases and winter tolerant. It's the perfect plant I think. (the insects think so)