RickM, what I was suggesting for you to do was to take a county road or state hwy that would of bypassed the scales, instead of staying on the interstate, which would of saved miles as well as time and allow you to see some of the country side, kind of like cutting a corner. Your rig will not be illegal to do this and I was quite shocked at HBarlow's comment to my post. As long as you stay within axle ratings of your rig, which is what HBarlow might of been confused with, concerning my post, you will not have to worry about any road in the US.
The way this thread seemed to be going was a concern for the scales, and the delay in most cases if the scales were busy, or the worry some out of control rookie trooper would of harassed you. My experiences with scales have all been positive, and if I would save time and miles going by or through them I wouldn't hesitate to do so.
I hope you have a safe trip and enjoy the country side. It is a very nice thing your doing for your inlaws. I had to take care of both of my inlaws because I was the one that was able to quit my job due to a minor health issue. I'm sure they will have more respect for you after its all over and realize they have left their daughter in good hands, when they are no longer able to do so if needed. I'm a father, and hope my son-in-law will do the same for me if needed and can relate to there necessity.