12 or 14 ply, What Do You Use On Your Motorhome Tires

Part of my understanding of the ply 12 vs 14 or F vs G rating is the sidewall is stronger and has less flex with higher loads and can handle higher PSI, I could stay with the 12/F ply but with my trailer weight in back the F rated tires will have more flex and run hotter but might run softer, I also hear a lot of blow outs on RV's so I thought the 14/G rated tires would offer a safer ride but a little stiffer at the same PSI.

Motorhomes don't do so well in blow outs..