Remember to protect your dogs that hike with you from ticks also. We took our dog with us on several occasions last summer. He was not tick protected because prior to those 2 hikes, he never picked up ticks. Well - we took him and both times picked off many ticks - disgusting! But worse, he contracted lyme disease and died from it 3 months later. The vet swore that we didn't have lyme disease in our area but our dog sure picked it up and due to his breed (a shepherd mix) he did not respond to the antibiotics used to treat lyme disease.
It was very sad and heartbreaking and I could have kicked myself for not getting a tick colllar for him or using front line - I just didn't think about it since he never picked up ticks in the past and this was just a little hike in a local nature preserve.
Just now getting back into the spirit of geocaching - but don't know that I will go back to that preserve.
Just a heads up - don't forget your canine companions!