I lease and order my trucks with a tow package. I never had any issue and i don't expect any because im within my trucks gross specs.
If you add items like roof racks or a tonneau cover, try to get items that you can remove without doing damage to the vehicle.
If you think you might need more miles than the standard offer, prepay for extra miles .
I roll all cash fees into the lease price, tax, down payment etc. If it gets stolen or totaled after you drive out of the dealership , you will loose that cash.