Tire Rotation

Only when you see uneven tire wear.

Only when necessary X2...play close attention to the right front.

I sure wouldn't wait till I see tire wear! :S You should have a manual from your tire manufacturer...or I would call their number.

Manufacturers don't usually recommend rotation on vehicles with dual rear wheels, unless you want to rotate a spare through the front.

Many owners have valve stem configurations that are position specific, making rotation more difficult than just moving those eighty pound wheels around.

Tom x2! Those fronts will wear a little faster than the rear duals. If you have a spare you can divide the wear among three tires. Let alone not winding up with a spare that'd aged out and never been on the ground!

Have never rotated tires on any of my MH's.
You will find many of us who do not rotate them.

One reason. It would require dismounting the tire from the wheel. As the front wheels are not same as rear. Even inner and outer wheels are different on rear.

This makes me wonder if a spare tire would work if each of the wheels are different.

The wheels don't start out different, unless the set isn't all steel wheels. Those of us with custom valve stems have one kind of special valve in the two inner duals and a different special valve in the two outer duals. Fronts and Spare would have the same ordinary valves.
Spare with ordinary valve will serve anywhere.

Combo Alcoa and steel rims.

I take it your Alcoa's are polished on only one side, intended to stay on the Front with that bright side and Rear Outer with the opposite side bright.

They ARE pretty, and they have the potential to ride a little smoother, but gotta say, glad I don't have that complication.