Good afternoon. I have family member taking a cross-country road trip from IL to WA. Standard SUV which is going to be packed with gear to the max. I am trying to find any state laws regarding just how high one can pack the backend of SUV without getting stopped by these "States' Finest" officers for rear window obstruction. Not much luck on specifics. It may just be common sense, but these days, one can never be too careful... Anyone with further information that lives in or has traveled through these states is appreciated.