What others have said is correct.
Taking a break that early without much driving can be problematic if you don’t know what you will be asked to do later on. If you have reset your driving, return to the depot (taking 30 minutes, say) and then go out on a 2 hour each way drop, then you may need another 45 minute rest.
I would take the attitude that 2 hours is a bit early to take a break, so either sit on other work or use POA while waiting to get in (not your fault they aren’t open). Then probably use some more driving before having a break.