When we lived down in Louisiana, Bubba, B.J., and JimBob all recommended that anytime your trailer was going to sit for a month or so or more, jack that rascal up and move the tires a quarter turn every few days (at least weekly) so the "bearings don't get a flat spot." Even in those days (1981 and prior) they also recognized the effect of direct sunlight on tires, and said to park it under a carport or hang a tarp over the boat to cover the wheels. So, the 300 or more bass fishermen I mentioned above can't be all wrong....right???