Becky, I have never done any hand quilting, so I'm not sure how much basting is enough, but when I quilted on my domestic machine, I would put a pin about every 4" all over the quilt to keep everything lined up.
I pin basted on the floor by taping the backing to my vinyl flooring so that it was taut but not pulled tight, and smoothing the batting and quilt top in place.
Since you are hand quilting, would the extra starch in the backing be a problem? I don't know. Maybe you could try a small practice sandwich to see if more starch makes it harder to needle?
I now quilt on a HandiQuilter16 mid arm machine, so neither of those issues are a problem for me now. I'm a lucky lady!!