Dress for success. I've notice that the Ron Paul supporters have a "look". That look is most notably being under dressed as is they seem to show up wearing hoodies and very casual clothing. They'll slouch, be unshaven, have wild dyed hair, etc. and generally look a little too hip. I don't blame them though why should you dress up to respect the people who are destroying your party and country. However if you want to infiltrate you have to blend in and be perceived as one of them.
Case in point:
At my convention the Ron Paul supporters were easily identifiable. They were younger and as I described above. They tended to all hover around in the corners of the room (a sign of intimidation) and kind of talk amongst themselves and generally act like they were dejected for having to be there.
Myself and another Ron Paul supporter decided to dress as sharp as we could, nice suits, shoes, ties, the whole nine yards. We also tended to hover together in the corner at first. After a few minutes party people started coming up to us asking if we were attorneys. One HUGE party guy who is also the judge executive of our county came up and jokingly asked if we were FBI or CIA agents. He talked about how it was great to see young people getting involved in the party, bla bla bla, and talked about how we need to get behind Romney so we can defeat Obama. We just kind of agreed about how bad Obama is yada yada. He talked to us for an hour and a half about all sorts of stuff and introduced us to a few other party guys and basically pulled us in to their fold. All the while there was the other group of Ron Paul supporters huddled in the corner with their ripped jeans, hoodies, and sketchers getting the cold shoulder. We would have never been approached if dressed like the other group. When Tyler Durden wants to pee in the soup, he dresses like a bus boy.