We just spent several days in the field in Northern NY. Ticks were a serious concern. On one day I took 7 ticks off of my clothes, and one off of my body.
The deer tick, officially known as the Black Legged Tick is the one that causes Lyme Disease. You don't want that disease. It makes the H1N1 virus look like a weak contender.
So, if you will be in the field, hiking, biking, hunting or looking for mushrooms, check you and your companion for ticks that evening. Might even be fun after a couple of glasses of wine. :-)