[MrGallegos]

Before you go, you can always use Google Maps satellite view and street view to see what stores, point of interest, parking areas, etc. are along your route. Plus you get to see the area virtually so when you are actually driving it you will have an idea what to look for, such as landmarks, intersections, etc.

Also pick out some alternate campsites that come before your pre-planned site incase you are too tired, so you would already know ahead of time where to go.