I tried the wall method with a queen size quilt. It did not work for me. Maybe if I had a helper or used different batting. I used a wool blend batting and the 'stretch' of that was difficult to get it to hang straight. I eventually had to call it quits and use tables.
If it is a large bed size quilt, I will use to banquet tables. I actually place pieces of poster board over the 'join' of the tables. (My tables have rounded edges which leaves a slight gap along the edge where they meet. I will then use either basting spray or saftey pins to baste everything on the top of the tables. Once the center is done, I shift the quilt to reach the other areas.