Jim and I have purchased a "DreamSack Double" from www.yaladesigns.com. It's a queen size, extra long silk (let's hear all the girls say, "Ooooo, SILK") sleep sack with a built in pillow pocket cover and two side openings with velcro closures. Lovely, though a bit pricey...$130.
We will give it a try on the maiden voyage of Spamalot.
Jim's sister picked up something for her RV called a "Travasack" that looked fantastic. It's a fiber filled comforter with velcroed removable cotton sheets and looked perfect for our needs. Unfortunately, that company went out of business last year. And so, as we searched for a replacement, we found the DreamSack. We'll just throw a comforter over the top and that should do it.
We'll let you know how it turns out.
Jim and Sue