before taking some of the advice here, you need to understand that new Ram dually trucks with the tire pressure monitor system use a different frequency to monitor the inside dually tires. you can only switch the inside dually tires left to right and they have to stay on inside.
But if they are steel wheels I would recommend Xing the fronts to the outer rears. this keeps the direction of rotation the same.
but if they are polished wheel like my new truck, I will run fronts until shot, than buy 4 nicer tires for back. this leaves me 2 set of back tires that I can run on front as needed.
Edit, and this subject should be dually tire balancing problem, not rotation problem.