Avoiding tight places
After you get used to the wheel cut (how sharp you can turn the front wheels) and keeping an eye with your mirrors on your tail, you will become comfortable with navigating. As you mentioned, not being able to back up is the biggest concern and gas stations can be the worst, especially the newer dive in pumps. I have found driving into the station and around to an outside pump, facing away from the store works the best. If the site is too tight I just drive on out and go to another station. I always fill at about half a tank so I have never had problems since using this process.
I also suggest Garmin 770 RV GPS. It has voice command so you can use while driving totally hands free. This will help you avoid low bridges, narrow roads and LP restricted tunnels. I love it.
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