Are you allowed to leave your car parked for 6 or more hours in this rest area

Most rest stops have a 10 hr time limit but those rules are loosely enforced. Just don't push it past 24 hrs.

Let us know how it goes. I would not leave it overnight

I believe when I was there was signs limiting your parking time

Shouldn't be a problem

I guess so but that's totally on your risk

I guess you are allowed !