Some of the comments above warning about maybe one tire in each rear set being loaded heavier is one reason I keep all four dual tires inflated to their maximum pressure (80 lbs for our Load Range E tires), even though load charts say I don't need that much pressure to handle the total load on the four rear tires. I figure that gives me an extra margin on both safety and long term tire wear. The ride in the rear is a bit stiffer, but we've gotten used to it and switching to Michelin's new M&S 2 tires (long before the recall) has helped reduce the ride stiffness resulting from use of 80 lbs. of rear tire pressure.
By the way, we had an outside left rear tire failure (failed rubber valve stem - we now have metal ones) on our Class C some years ago. Due to use of 80 lbs. of pressure in all rear tires, there was no catastrophic loss of control or feeling of danger. We just slowed way down to 10-15 MPH and traveled along the highway shoulder to a town about five miles away. We didn't even call ERS - just had it repaired in that town.
Even though the other tire in the dual set was drastically overloaded for those five miles of travel, that tire (Michelin M&S ... before they came out with the M&S 2) went on to serve us for years until we switched to M&S 2 all around.
Just as a side note, when we switched to Michelin M&S 2 tires, I went to a slightly narrower tire. One of the reasons being to increase the spacing between the rear duals so as to create a bit better air flow between the inner walls of the dual set tires for removal of heat from the opposing inward facing tire walls.