<Would it be to much to stabilize and spray starch the fabric. >
If you are taking the quilt sandwich apart, you could certainly spray starch the backing fabric. It would take several layers to get it stiff enough, though, and you have to be careful to let the spray starch absorb each time before ironing. It's much faster and a lot less work to use the "painting" method I described. The fabric doesn't need to be completely dry before taking it out of the dryer to iron; just dry enough so your iron doesn't get gummed up with lots of starch.
Basically, you want the backing fabric to be very stiff before layering the sandwich. In my experience, one or two layers of spray starch won't be enough; I would guess it would take four layers or so.
If taking the quilt sandwich apart, I would also starch the top. For that, I would definitely use spray starch. Even just one layer would help. The top doesn't have to be as stiff as the backing fabric because you can see puckers coming. I would probably spray starch once from the back, and then give the top an extra spray starch from the top.
Mary