You can also stretch the backing too tight. then when you untape,etc. the fabric relaxes & you have a pucker. I use the black binder clips to clip the back to the table, layer batting on next.move clips to hold these 2 layers, then place top on, smooth carefully & move clips to hold 3 layers. then pin what is on top of the table. move layers over to get what hangs off the table. clip in same order. Church or Firehouse tables work great.
Which reminds me of something that maybe you can take advantage in your area---our Guild gets to use the Fire station meeting room once a month for free because we are a non-profit. good lighting, AC, lots of tables, etc.