I knew someone would come up with a long answer. I believe most coaches never have the tires rotated. 99dart gave direction on how you might rotate if it becomes necessary.
Remember, these tires are designed for heavy duty, unlike your cushy sedan tires. They will weather out and need replaced long before most of us wear off the tread. The tires on any RV aren't directional, meaning they could be mounted on either side.
There are plenty of things to worry over on an RV. Rotating tires isn't one of them.
Bad decisions make great stories!