Air pressure help ,!st pull in County

Did you go to the pull in Brenham. I didnt make it but dad was there with the tractor. I opted for a day on the river and at the lake. We are going to be at yalls pull unless something drastic happens. Is it going to be covered?? About teh tire pressure. Our tires are old and hard which makes a big difference having hard rubber. We have never run more than 6 or less than 4 on respected hard or soft tracks. your going to have to run more air in new tires. It will take a pull or two before you figure out how much to run on different surfaced tracks. I would watch other tractors and how their tires perform, then just ask the puller, most will tell you, anything to help out a new puller.