There exists such a thing as an inflatable buffet and salad bar. How perfect is this for you backyard and potluck wedding planners? Just inflate it, fill with ice, and your food will stay fresh for your whole party! Once the wedding is done, you can deflate it and store it easy peasy. Then you can re-use it for ALL the rest of your backyard parties as a fabulous married couple. I'd say it's a pretty sweet $20 investment.
Check it out on Amazon.