A:The Outdoor Research BugOut Gaiters you mention ($38) are also a great idea. Like the Ex Officio pants, they're treated with Permethrin to repel ticks and other bugs. Plus, the gaiters themselves are lightweight and durable, and will help keep dirt and rocks out of your boots.
Otherwise, take the standard precautions: Make sure all pant cuffs and shirttails are well tucked-in and avoid knee-high vegetation, which is where ticks hang out. When you wash your outdoor clothing, make sure to dry on moderately high heat. Ticks are hard to drown, but heat and dryness will kill them. And, of course, give yourself a thorough self-exam at the end of each day. Good luck!