Yes! You are a kindred spirit. I love, love, love picnic blankets. I think asking guests to sit on picnic blankets to watch your ceremony would create an incredibly relaxed, intimate, and unique experience.
But I agree that it's important to keep your guests' physical comfort at the forefront of your mind. Here's my advice:
- Look through your confirmed guest list and estimate how many people would prefer to sit in chairs.
- Figure out where to borrow chairs from. I know I personally have four folding chairs that I would be willing to bring with me if I were a guest at your ceremony (I'm not trying to invite myself; I'm trying to point out that you can tap into the resources of your friends and family!) And I bet your partner can figure out someplace to borrow them from on campus. If all else fails, you can try to put an ad on craigslist to see if someone has access to some folding chairs and would be willing to let you borrow them. You might have a friend or family member with a truck who would be willing to pick them up.
- Give guests the heads-up that they will be sitting on blankets during the ceremony. This knowledge might affect their choice of attire. If you have a wedsite, it's very easy to convey this kind of information.
- Start searching for sheets from thrift stores! (Matt and I did that for our tablecloths.) Make sure you open them all the way in the store to find out if they have any stains.