Pink Scraps flimsy

The top is done. Now I need to find the backing. I used almost all the pink scraps but there are still more. Do they multiply in the dark like coat hangers?! I think so. Anyway, my plan for quilting this is just wavy lines but since I've not made anything like this before, do I need to stabilize it first? Will the squares go wonky if I don't?

Now I must get something on the longarm before anxiety hits that there are too many tops and not enough 'dones' in the closet.

BTW, we are having storms like I've never seen storms in our part of the world. Here is one picture. Scary! These storms, with tornado warnings, are happening at least once a week this month, sometimes more. They are over our two largest cities and along the route in between.