We picked up the RV and everything initially seemed fine. Once we started driving into Yellowstone, however, a septic smell inside the RV got progressively worse. By the time we arrived at our campsite, the odor was so bad that other campers nearby actually complained about how badly our RV smelled. Although the septic tank was empty at pickup, it clearly had not been properly flushed or treated. After arriving, I had to flush the system multiple times myself before we could finally get the smell under control. We also discovered that the septic hoses provided with the RV were leaking at the connections, creating another unpleasant issue we had to deal with at the campsite. In addition, the DVD player did not work. We had a great Yellowstone trip overall, but these issues were disappointing and avoidable. The septic problem in particular was unacceptable. The RV and sewer equipment should have been properly cleaned, treated, inspected, and ready to use before being rented out.