There's alot of variables. Here's what I would do.
Spy on your plot from a distance, see if he/anyone else is investigating. Did you
act scared/spooked? How far away was this guy when he saw you?
OR:
be out in that general area with a backpack and a bike as much as you can. Make it look like you have a workout/hiking routine. Again, there are variables, the suggestions above are a rough plan.
Just be carfull, will ya? Do what you think is best for the situation.
Good luck, let us know what's going on.
-tux