Maybe tracking activity instead of specific players?
Asking bartenders in different towns, could point you toward the action, a non-private location/area/map in a radius, like 5-6 squares, that has the most players. Bartender would do that for a tip, and the answer given would be 8 direction, N, NE, E, SE, S, SW, W, NW, and for a bigger tip the rough number of players, like, a few 1-4, several 5-9, pack 10-14, lots 15+.
Edit: Optional the distance, like just outside town 1 tile, close 2-3 tiles, a bit to the [direction] 3-5, far away 5+