I do more what NJQuilter does. My table is about 60 in wide and i do have stuff hanging over the edge, and the weight off the back keeps things taught as i hand baste it. I will get puckers if my basting is too far apart or if i use safety pins. If i have plenty of batting and backing, I don't care. If I have no play room w/ the batting or backing, I baste it real well so nothing moves.
If i have to baste a king-size quilt, i go to a friend's house who has an 8 foot wide table and i can walk around all 4 sides easily. I can only walk around 3 sides of mine easily.