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I have been told by many driving instructors that when something happens when you are in a vehicle the best thing is to get back behind the wheel and drive. I have had to use this advice a few times plus have had my family do it too. Just start out slow. If you are on a 4 lane just do 50 mph. As you get more experience with your motorhome you will start to feel more comfortable driving it. When you first buy a new rv the worst thing to do is start looking around at things when you are driving. Do this when you are parked.
As also mentioned load it like you will be driving and get it aligned. They are aligned when the chassis is built but not after the house is put on. It will make a world of difference. Everyday go out and look at it. Believe it or not after a while it will look smaller. When we first got our 35 ft it looked like a 45 footer. We now have just gotten a 41 foot diesel pusher and it looks like it is 65 feet long. This too will look smaller after a couple of months.