Circle wedding ceremony link, Kinda like this idea. Alter is covered by some lightweight fabric and tied to four poles. You could have holders for the poles or ask special people in your life to hold the poles?
30 Unique Altar Alternatives For Outdoor Weddings Ceremony in the round. Not only will your guests get a unique view, but you'll also be (literally) surrounded by your loved ones during that special moment. Photo by Jose Villa via Style Me Pretty