Sorry to just barge in. I guess I should introduce myself. I'm Catmint. I live in Maryland in the DC area. I've been gardening for the pollinators for about a year now. I've been active in another gardening forum but am new to ATP.
I think whether it's a salt marsh or a yellow woolly cat depends on how furry and big it is. The yellow woolly cat is one of the Tiger Moth species, and it grows into the Virginian Tiger Moth. It tends to be on the larger, furrier size. The salt marsh cat tends to be smaller and less uniformly furry looking--you can see the individual setae sticking out.