Yeah thats something I forget that JW hit on, keep your shirt/pants tucked in and socks tucked into your pant legs or base layer. Make sure to shower recently after returning from the field to check for ticks and always do a thorough inspection. You can manually feel/sight check most of your body but your back you'll need someone to either glance it over or use a mirror. If a tick bites you and its recent still go to the doctor as its better to find out what the tick was carrying, its better to be safe then sorry. If a tick does bite you you can either remove it yourself or the doctors will, if you remove it yourself save it and bring it to the doctors for testing. Another thing you can do in addition or in a pinch is duct tape your pant's legs/socks to you so ticks can't get in for sure or if you have some string you can tie your pants legs tightly around you to hopefully prevent ticks from continuing up your legs. I know a couple people who have been severely messed up neurologically and/or physically by lyme's disease from ticks so its best to be extra careful.