I would think the MiniFly would be fine. I use the Mamajamba with a WBBB. I have never had any issues in rain. Had the MinFly been around when I bought mine, I may have gone that route, but this tarp has been great. I think the Mamajamba is wider though. Maybe one day I will buy the doors for it. . Don't try too hard to reduce weight for bike touring, a few ounces more isn't bad, and having less than what you need is.