I know that there are some free, down-loadable "Apps" for mobile phones that can locate a person in 15 minute intervals.
However I don't know if they can track a persons route over a number of days - it might be that you have to set something recording before you leave or arrange for someone else to hit the button on day one of your journey.
It might be worth a bit of research to see if it can be done through this media though.
"Findwhere" is the specific program I've see but there are bound to be others.
ATB
Ogri the trog