You can also get the TravelPlus software (link at the bottom) from the ARRL. You map out your route on a pretty good road atlas right on your computer. It draws a line along your route and then prints you a list of all the repeaters within a certain range to either side of your route. You can specify everything from distance to either side, what band and more. Highly recommended!
.ethan - KB1GXW - Boston, MAhttp://www.arrl.org/catalog/index.php3?category=FM+%26+Repeaters