Yup. No problem turning and adjusting when weighted. I did mine sitting on the pavement by measuring, turning the steering wheel so I could get at the tie rods, adjusting, driving around the block and re-measuring. Repeat as needed.
I think that you will find a tape measure difficult to use. That's why I 'stringed' the car. Stringing also allows you to make sure that the steering wheel is straight, etc, etc.
All you need is plastic water pipe, 4 jack stands, ruler or tape measure and fishing line.
John