My trailer sits at home in a metal shelter. The left side faces west and
is only partially shaded. The right side is almost total shade. I noticed slight
age cracking in the sunny side so I swapped sides a couple years ago when
I was doing brake/bearing maintenance.
Lately I notice that one tire on the left side is wearing more than all the rest.
I probably need an axle alignment but since the tires are about at the end of
life due to age and some minor cracking I'll probably just replace them and
watch the new ones for any excessive wear.
I guess that's a long way of saying I rotate them if they look like they
need it. Otherwise why bother? The whole idea of rotating tires is to try and
get more even wear. If your tires show more or less even wear I see no real
advantage to rotating. The best way to rotate them is by heading down
the road to your favorite camping spot!