Sandwiching and basting a quilt was the most hateful aspect of quilting to me. I couldn't stand doing it. I did it but I sure wasn't happy about it. My all consuming hate for sandwiching was a major factor in me finally getting a longarm, that and the fact that I just plain old sucked at machine quilting on my DSM. I got my LA and haven't looked back. This however is of no help to your delimma. I did mine on the floor. Oh and the board method mentioned by Paniacs is by Sharon Schamber Here is a link to part 1
http://www.youtube.com/watch?v=bhwNylePFAA