The Orvis would be for washing the finished quilt; I use Orvis for my finished quilts, but regular detergent can also be used.
There would be no need to use special soap for pre-washing the fabric. I'm not sure what detergent pods are, but you wouldn't need the same amount of detergent you use for a load of dirty laundry. I just use a very small amount of Woolite liquid when pre-washing my fabric.