I would call the dealer and have the tinted window option added to my purchase order. This should not be a problem as long as the factory has not yet started construction of your trailer. My reasoning is twofold: 1) Less heat gain and 2) more privacy in your trailer.
Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.