....or something nearby who can easily see me. ...
Well, notice what this quote ^^ assumes ? It assumes that "those that see you" care about or object to you. If you start with that mindset, then your body language (perpetually looking over your shoulders, and locking eyes with each passerby, with the persona of "oh no, does he see me ?") will simply become a vicious self-fulfilling look. People notice those vibes, and only THEN ask themselves "gee, what's he doing ?". So instead, you "act like you own the place, and the reality is, no one gives 2 sh*ts about you.
In fact, I find md'ing to be just the opposite : Passerbys will ask "what's the best thing you ever found ?", and "how deep does it go ?", and "where can I buy one of those". So do not start with the mindset that 'everyone hates me'.
.... off limits sundown to sunup...
Re.: the "closes at sunset" type signs at some parks : I know this is probably not going to sit well with some folks on the forum, but here goes : I am of the opinion that those obligatory boiler plate signs are so that the cops can shoo away a late night party. Or shoo away someone who thinks he's going to homestead the park, etc....
For many years I lived across the street from a park with that "closed at sunset" , on the list at the wooden sign. Yet this park connected 2 disparate neighborhoods in my side of town. Connected with a sidewalk through the park. So it was not unusual to (gasp) see someone walking through the park. Or a romantic couple watching the stars there, or whatever. The ONLY time I ever saw the cops come, was a neighbor was getting tired of party noise from teenagers keg party. They came and shooed away the kids.