sometimes i've pinned a quilt to the drapes over the sliding glass door to take a picture, if it is too big i lay it on the bed and use a step stool to get above it.
i heard that you can take a quilt in to walmart portrait studio and get pictures done (professionally) but i have not checked to see if this is true or not, if i ever finish my (heirloom quilt) i will give this a try and see if they will really do that or not...for the price of their regular package.