Long term storage

[turner15]

I have picked up a new project truck and had some questions about storage.
I am planning on storing it for about 5 years.
I know the gas will go bad so I will try to leave the tank empty, I'll disconnect the Battery.
It is going to be parked outside on grass. Should I cover it in a tarp? I have a "car" cover that will fit it but I'm not sure what the weather will do to it (snow)
should I use the car cover then the tarp? I have been told that condensation may build up and rust it? Should I leave it uncovered?

Any advise would be great.