If my memory serves me right, during orientation for one of the companies that I worked for, they even mention about enjoy your self, but here the rules. Out of route was a no no unless DM said OK to.
Also if your under a Hazmat thre will be rules you will have to follow also. If your in a location and your at a truck stop, as the Fuel desk on policy of droping the trailer and bobtail. Last company I did not want to come home to an empty home so I stayed out long periods. I had rented a PO box near the HQ and I would bobtail every time I was in town. Or if I did not have time to Bobtail, I'll go by there with the trailer and pull in and get my mail and leave. Read the mail later.