I ended up running with Google Forms and using rclone to sync the data to Dropbox. I use rclone anyway for backups, so should have thought of this in the first

I ended up running with Google Forms and using rclone to sync the data to Dropbox. I use rclone anyway for backups, so should have thought of this in the first place. I continue to use Google products but I am determined not to rely on any of their services in case they "go away". I know with this solution I will always have my data.