Another issue to be aware of on long overhang is under loading of the front axle. If you do not have at least 80% of the front axle load rating on the front axle you will have handling issues that can not be corrected. Weight behind the rear axle takes weight off of the front axle and the farther back from the axle the greater the effect. There has been some in the past because of design flaws , slides, generator, tanks fresh and waste being located behind the rear axle it is impossible once loaded for a trip to have enough weight on the front axle.