I wanted to give you kudos on balls of steel. I can't even imagine trying to have the trust in a another individual, or even in myself, to chance barreling along on a DF bike blind.
I would imagine you know more about this than I do...recall reading about a blind guy that uses a manner of echo-location "click" to ride a bike. I am sure a quick search would turn up something. Even in spite of that, I would imagine him having to have a guide or sighted individual make sure the area was smooth and clear of obstruction like potholes, loose sand.
Hope you work something out. Aside from your own bike, perhaps your SO would consider being the pilot on a tandem?