The TrackStick II is a personal GPS data logging and tracking device. The company website suggests you “Find a good camping spot and leave it to TrackStick to remember where it is and the path you took to get there.” Apparently you dowload the data into Google 3D on a Windows PC only (sorry Mac users). Trackstick runs on two AAA batteries and although I didn’t see its weight, it appears about the size of a “thumb drive” for data back up. At Amazon you can get them from $130 to $189. A bit pricey unless you are a gearhead/techie who loves having all such devices along with you on the trail. Great for off-trail.
Be light. Be safe. Be one with the pack.