Here's an idea:
Vicki...you can cut circles from old table cloth then stitch elastic around edges or make a hem & use a draw string. A really simple idea is to cover all food with another tablecloth on the serving table. Of course you can buy the covers on different sizes they are inexpensive.
We use wrap that seals when you press it down. It comes in stores where they sell handy wrap. Also, there are elastic band plastic covers too. Even linen dish clothes work to lift and get the food then put it back down. Hope this helps
You can turn a bowl upside down to cover the food. It would be a bonus if you use clear bowls so you can see what’s under each bowl.