We plan to take the Model S on its first road trip this fall -- though it will be trailered behind an RV. We have quite a few stops planned, and the Model S will be our get-around car while at those locations. Our stints between locations will be fairly short (5-6 hours), but I'm wondering if there's anyway to charge as we drive (short of the drag-in-reverse thing that's been bounced around a bit)? Never taken an RV out before, but I imagine that along with the outlets inside the actual RV there's electrical hookups to the trailer. Would enough juice flow for us to plug in the Model S somehow? Would be a good backup in case we don't find somewhere to charge at our destinations.