Years ago when I was still a cover driver they sent me out in a P500 with 300 stops jammed front to back, top to bottom. Fortunately it was in an area near my moms house. I informed my management team that my first stop after my air was off would be my moms house and I was going to dump half the load in her garage. I would back dow in the driveway and sort it all out and even separate it in her garage by neighborhoods. I'd go out with half the load then and circle back to get the rest later. If they sent someone to come and help me I would tell them to just have the driver go to my moms and take what they could. It would out great. I Wasn't on that route the following year but they asked if they could still use my moms garage the same way. She didn't mind so they used it another year. They even had access to the basement bathroom incase they needed to go. the next year she had a garage door opener put on it so they couldn't just open it up manually anymore.