raincoat and pants... failing that, a garbage bag poncho if you're really hard up.
nightfall 1 I had no rain gear but I did have a thermal layer if it wasn't for that I think I would've been pretty miserable. I think though it's still summer enough that you don't need a thermal layer, but have some extra layers in case it does get cool. Leave them in the car and get them when you need them if you have a break in action. It's not when you are moving when the nasties set it, it's when you sit down to rest.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.