I was outside sign waving (by myself, hehe) in Parkville, MD holding a "Google Ron Paul" homemade sign. I don't know if there's a meetup group that's been working in the Parkville/Towson area, but there are a LOT of supporters!
Also, my favorite car that pulled up (was at an intersection) was a guy who rolled down his window and asked, "Didn't I see a blimp with that guy's name on it earlier?! Who is he?" I gave him a slim-jim and told him a little about him, and then as I look up I see the blimp no more than a mile away from us, so I point to it. The guy's reaction was priceless! He said "I guess he's not a longshot anymore, huh?" as he drove away.
What a great day of sign waving. I saw the blimp at least 3 separate times, and got about 100 honks, handed out 50 slim-jims, and got 2 evil looks. Not bad, not bad at all.