In my opinion, there is no failsafe method to any "concealed" carry situation. We could go on for days about "what if" scenerios.
I agree with Sport45 on this subject but that's just me. I carry to have access if needed. I am no patrol officer so my chances of actually needing a quick draw are very slim in the first place. I am more interested in comfort and concealment, but still having access, than being quick draw McGraw.