I think number of ticks is partly related to natural environments one travels through. Last summer I took wife and son on nice easy hike up to scenic knob in Ashland NH called Whitten Woods. I thought they would love it as trails are maintained mostly grassy with very easy footing. On way down we started seeing ticks on our socks and when we got back to camp we started picking ticks off like crazy easily 15-20. Grass is definitely bad news. I had same experience walking on a trail going across a grassy meadow. I did 8 mile bushwhack at 2000-2400' elevation through combo of open hardwoods, birch glades, and thick spruce - not a single tick. Of course spring hasn't really kicked in at tht elevation. Monday was warmer and I had to traverse some brushy clear cuts on west slope of Mount Carr and had two ticks to show for it. Temperate forest lands of southern New England I think it is best to stay on the trail. They also seem to be at their peak during spring. Based on previous comments I think I will definitely look into getting some permethrin.
Tick survival is higher for warmer winters or winters with a good snow cover (better insulation for them).
Blacklegged ticks (the carrier of Lyme disease, also known as deer ticks) can get you any time of year, but peak in the spring/early summer and the fall/late summer (they need blood meals at two different stages in their development). The only time that you are safe is when there is snow cover and/or it is below freezing. (I've heard two versions: when there is snow cover or when it is below freezing. Given my uncertainty, I only consider myself safe when both conditions are met.)
Blacklegged ticks are blind and sit on grasses and low foliage to wait for you to come by. When they feel the vibration of your approach, they reach out and wave their forelegs, hoping to snag you as you walk by. (Lone Star ticks have vision and will actually chase you...)
Blacklegged ticks, in spite of their alternate name of deer tick, can get their blood meals from a number of animals (eg mice and humans) and do not require a local deer population.
There are about 7 different tick-borne diseases found here in the NE. Only Lyme has the 24-hour delay before transmission--the others can be transmitted immediately upon being bitten. Thus, the only truly safe procedure it to keep them off you in the first place. (Tick inspection after getting home is helpful, but not 100%.) Permethrin on clothing and DEET on exposed skin is a good first line of defense...
Larry Dapsis (Deer Tick Project Coordinator - Entomologist
www.capecodextension.org) has given a number of talks on the topic. A video of a 2016 talk can be found at
https://www.youtube.com/watch?v=A47Gp2E_fNo&feature=youtu.be (2hrs--the first hour is on mosquito protection and the second hour is on tick protection). His slides from a 2014 talk can be found at
http://orleansconservationtrust.org/wp-content/uploads/Larry-Dapsis-Tick-Presentation.pdf and more useful info from the town nurse can be found at
http://www.bedfordma.gov/sites/bedfordma/files/file/file/lets_talk_about_ticks.pdf.
Doug
EDIT: the other name for the deer tick is the blacklegged tick, not wood tick.