I drag my L3560 between Fresno and North Idaho twice a year. Never once been inspected for anything but the ag inspection just before Weed.
Never had anyone come onto my private property, the church property, school, or any place I've taken my tractor. My neighbors have never had an inspector on their farm land look at any of their equipment.
My dealer would have no problems servicing my tractor with or without the emission system installed.