Food before the ceremony

We are having a small brunch buffet at each of our parents which is where we are getting ready.

You can order from Kettleman's bagel they do catering or from Panera breads who also does catering, and you can do a sandwich, cookies and chip, if you have one of those in your area.

Subway caters as well, or just grab stuff from the grocery store they have spreads.

Make it fun and do a potluck lunch where everyone brings something.

I think it would be a really nice touch to provide some fruit, pastries, juices/coffee/tea. If I was inviting the party to help decorate, I would definitely feel the need to provide something for them - it's a very nice gesture I think.

One friends wedding she had fruit and veggies trays available but we went to get lunch at a mall food court so we paid for ourselves. A different friend had the same as the other but also had sandwich and meat trays, everyone ate sandwiches. So it depends, these were two different types of people and weddings and neither had any expectation.

If they are also decorating for you, then they are literally volunteering their time and labour for your day. In this case, I would absolutely cover their lunches.

I think it varies. My best friends wedding, we all chipped in a bit to cover lunch. At my wedding I had bagels, cinnamon buns, fruit, and charcuterie available for everyone while we were getting ready/before the ceremony.