I have a question. Do you think it's rude to stand during the wedding ceremony as a guest? My fiance and I are getting married on the beach and are having a 20 minute ceremony. We're thinking about having everyone stand in a circle around us, but don't want to anger anyone by not providing chairs. What do you think? We plan to provide chairs right after for the cocktail hour, and plan to have chairs available for anyone who needs to sit during the ceremony.
Otherwise I think 20 minutes is totally reasonable - you'll be standing for 20 minutes!
Some other thoughts:
Is there alot of people? will they all be able to see?
How casual is it? Can they bring lawn chairs? beach blankets?