Remote ceremony - need plan b for rain

Hi all -


I’m literally stumped. We are having a private sunset wedding ceremony on a remote property that overlooks a valley. I do NOT have the option of using a tent. Reception is on a different day at a different location. We do not have very much nearby to use for just a 10 minute ceremony that is “worthy” of having a ceremony and I refuse to spend ungodly amounts of money to rent a space for 10-30 minutes. Ideas on what I can do for plan b? Helpppppp