Can I park overnight?

2 hour parking only. Even if your vehicle is logged at the fuel desk they will call to tow you or the guard will ask you to leave.

Sean marks spots are reserved parking and you have to pay to park there that may be where you see guards knocking on doors

Yes

Yes you can park overnight but if it's consistent they will ask you to leave

Ok just making sure saw the security guard knocking on people's doors

Yeah it's a truck stop