I have a 2020 RAM Bighorn (new to me) with Kumho Crugen HT51 tires. They were installed new before I purchased the truck. P275/55 R20 111T. Today is my first towing excursion with my 5k camper. Where should I start with truck tire pressures and what would be my range to try for safety and ride comfort. I've always been confused by tire pressure recommendations on the tire and door.