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?
This is how we are setting up the ceremony. The archway will be metal and in front of the willow tree. And we will have benches instead of chairs. There will be one main aisle and two secondary aisles.
Incredible Wedding Decor Ideas for Your Ceremony Altar