ExpertGPS is a waypoint tracking tool with support for GPS files and AutoCAD drawing. The application can be used to reproject data in any geographic format (lat-lon, UTM, US State Plane) and change datums. You will be able to calculate acreage, measure distance, elevation and grade.
The program downloads aerial photos and topo maps for any location in the US, saving the maps to your hard drive. You can then disconnect the laptop and head out on a trip with these maps.