Thanks, everyone! I've used fleece without any problems before (works wonderful on pet quilts). And, minky purchased from LQS's has worked fine for very nice quilts. Today, I bought some 'sale' throws to use for backing....hoping to save some money in the process! I bought 3 different 'textures' of minky-type throws to find out which type will work best. With the price of fabrics so high, I thought this might provide a nice price break for a few projects.
It'll be a experiment. I may find a quilt-as-you-go project is the preferred style for something that is problematic but the backing will be nice and soft!