I wouldn't worry much about the trip itself. I'd be more interested in when it last had any service. Make sure the driveline has been greased if it's a fwa w/ u-joints, check the oils, including the front axle, and find out if they've been changed lately, and maybe change out the fuel filters, that long at wide open you'll be drawing quite a bit of fuel through it. Might be worth having a tool box and the stuff to change them again depending on the life it's had, again you may stir up stuff in the tank and no worse place to have a broke down tractor than in the middle of the road. If it is a fwa and you want to get fancy, some say the tires will wear a bit better if they're turned around backwards, dunno if that's true, I know they wear different, but don't know if they really wear less. You could check the alignment of the front, and make corrections according to the manual. I wouldn't expect any horrible damage to occur due to a one time trip like that.