Seeking Overnight Advice

Falcon JSDF:
My agency have floated the idea of the odd overnight and I am up for the odd one.

My plan is to spend day 1 getting the load to the client and overnighting empty at a Motorway service station.
Do I have to leave my door open to stop the truck getting vandalised by people looking to steal summat?
Should I try to run the fuel tank low and fuel up in the morning when I wake up?
Are motorway service stations a bad idea and truck stops a better bet?

The truck is hard bodied, curtain sided advice also accepted.

Thanks on advance for the tips.

Leave the both doors open youll sleep better