Yes , you can ...
It is a truck stop. Of course you can.
No most public parks are dusk to dawn as far as hours of operation
12hrs max
Usually any rest stop is 12 hours max before they knock on your window and make sure you're alive.
As Michael said. Look for signs at any rest stop indicating "no overnight parking "
Yes you can no worries.
Pretty sure it's max 12 hours. There'll be signs indicating no overnight parking if not allowed.
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