Tracy, I've made a couple of them. I used the thickest poly batt that was available, and it was pretty thick. 2 inches? Maybe it's still available, and it came in a roll. Join the long pieces, with a figure 8 stitch, to get the width for the Queen bed.
After stacking, I tied through all layers with embroidery floss rather than trying to put any quilting on the body. These thick poly batts may still be available at upholstery fabric stores.
I think you can use two layers if the thicker ones aren't still available. Safety Pin everything together and then tie through all layers after getting it all smooth, and then turn and sew down the bindings to the back.
What a nice thing to make for your hubby. Let us know how it goes? Best Wishes.