My youngest sister got engaged yesterday!! To a wonderful man. We’re all thrilled! And need help with hashtags

as of right now just hashtags for the engagement events.
Their first names are Margaret and Marcelo, his last name is del Rio. The were on a hike and got engaged in a cave.
I’m the best out of my mom and sisters with hashtags and all I could come up with was #iDoRio and #encavement so any ideas are greatly appreciated. Happy Monday!