You pose many and complicated questions to which there is no easy answer. Federal and state laws impact the analysis. When you drive a company truck and take it home, Federal wage laws have specific provisions that talk about when the drive time to/from work is or is not compensable. Some of the other items you ask about will depend on the intial analysis of the drive time and are likely going to be subject to interpretation. I suggest that you talk to an attorney in your state familiar with both Federal and state wage laws about these issues. Alternatively, you could try talking to the Departement of Labor, Wage and Hour Division for an opinion.