One of the reasons I dislike triples on a road bike is that the STI indexing shifting is difficult to adjust. If I were to run a triple, I would consider swapping the left brake-shifter for a simple brake and using a bar-end or down-tube friction shifter for the front derailluer. Perhaps you're already considering running something other than STI, which makes a lot of sense on a touring bike -- simpler, more durable, less likely to fail, less expensive to replace, etc.