I heard there is a quilt pattern that has a bag/pouch sewn on the back that the quilt can be tucked into. Has anyone ever heard of this? Know where I can get the pattern?

I think what you're looking for is a quillow pattern. This link has free patterns or you can google quillow and get some.
http://www.straw.com/quilting/articles/quillows.html

Ditto

Have fun making one. They are so easy to store away.

That sounds cute!

Thanks - You guys always know the answers!

quillows really neaten up the couch, or the back seat of the car

That is a Quillow.

folding a quillow is a art form----failed to put my pocket on the correct way the first time daaah!!!!---also measurements are important---i did eventually make a few great quillows ----the recipients loved them--my friend used to sit with her feet in the pocket to keep them warm

My mom made my boys quillows and they loved them.