Gathering GIS Data

I am planning to purchase a GPS system, and take it with me to Lebanon. This is probably the biggest expense I will have on this project. I am planing to be in Lebanon for Christmas, so when I get there, I will drive around the village, on all possible roads, and this way, I will have accurate data gathered on this end. I still need to find the software that would store this data for me in a usable format.