Safest way to carry luggage on my carbon frame?
The safest way to carry luggage on a carbon frame is to use a trailer, like the BOB trailers. 



Carbon frames are very strong, but each area of the frame is designed and tested for the loads it expects from a given direction. Adding luggage to a frame not designed for it, i.e. Without braze-one or threaded mounts, is generally a bad idea.