What you might get from it with respect to signaling, is authentic experience you can later use while talking about solitary walks and thereby signaling.
Talking is not necessary—if people know (by observing you directly or by any other means) that you take solitary walks, this is already a signal.
So, to turn such a walk into a pure 100% non-signaling activity, you’ll need to make sure that no one will ever know about it. And even after that, the self-signaling component you’re talking about will still remain, because there’s no way for you to forget the experience completely.
Talking is not necessary—if people know (by observing you directly or by any other means) that you take solitary walks, this is already a signal.
So, to turn such a walk into a pure 100% non-signaling activity, you’ll need to make sure that no one will ever know about it. And even after that, the self-signaling component you’re talking about will still remain, because there’s no way for you to forget the experience completely.