Poison oak is pretty easy to spot once you have a vauge idea of what you're looking for. Next time you're out with someone who would know what it is, just ask them to point it out to you. I think all outdoor camps for kids are forced to do a unit on identifying it, so most people who group up around it can spot it... Now is a good time to start looking, as it's got leaves. Once it looses its leaves it's just as bad and much more dificult to spot.

Matthew