I ride with my 3 year old daughter in a Burley Solo trailer several times each week. We just got it last month, and now with over 100 miles on it, we couldn't be happier with the handling/comfort/ease of use, etc.
However, our regular route takes us through several drainage areas where my tires kick up mud/water and splatter my daughter. It's too hot here to deploy the clear plastic rain cover. So far, my only option has been to soak my daugher or go painfully slowly through the mud/water. (Not a great option considering that the water is always in a low spot followed immediately by a climb, and I hate to sacrifice my momentum.)
While there are plenty of after-market fenders/mud guards to keep the mud/water from hitting the rider, I haven't seen anything that will sit low enough on the tire to keep water out of the trailer.
I am envisioning a fender that would mount to the trailer hitch arm rather than to my bike.
Anybody seen anything like this?...or some other solution to the problem?