No such luck!! Just a ridiculously hot and sweaty search that brought up some giant toads and some big green frogs with webbed feet. I did hear plenty of bullfrogs though, probably why we dont have grays around here!
ETA: Now that I'm reading about them... I think the big green frogs I saw were Cope's Gray Tree frogs, they sound very similar and that's the noise I was definitely hearing. I have an Eastern Gray tree frog and the frogs I was finding were FAR bigger than my frog. They must be around somewhere then!!