Your DS tag looks like it is off to a good start. Up here in the Shenandoah Valley of VA, we too are playing a DS game but dirt/gravel only.
We have borrowed the idea of a Tag Map from other various Tag threads. This is especially helpful later in the game to see which areas are still "open".
It is easy and free as long as you have a Google account. PM me if you need any help getting one made. Only one person can edit it though.