Ticks used to be a minor annoyance but they’ve become a serious health hazard in your area, the northeast. With their ability to carry and transmit Lyme disease, you're smart to take serious counter-measures.
I'd investigate ExOfficio's line of clothing that is treated with a Permethrin-based bug-repellent called InsectShield®. Their BugsAway Zima Convertible Pant ($99) will keep ticks and other insects off you for as many as 70 washings. And with a lightweight nylon fabric that’s tough, dries fast, and protects from the sun, they’re also useful as trekking pants. (And they convert to shorts, although that may not be much of a feature in tick country.)