Ha, agreed. I've seen plenty of people who say they're going on a fixed/ss tour, and very few who actually go through with it. That's not to say the OP can't pull it off, but it is to say that single-gear touring seems to attract a lot of folks who haven't previously toured. Having only done fairly light touring myself and never ss/fg, I would strongly advise against doing so to the OP if it's your first touring excursion (is it?). Try it geared first, even for a quick weekend trip, to see if it's really for you and, if so, to figure out your gearing. As mentioned in earlier posts, I think it might be doable for a fairly light rando / credit card approach, but completely ill-advised for anything approaching loaded touring unless you're talking about super-flat terrain.

Also, fixed helping your "cadence and hillclimbing" is debatable; imho it's bogus once you have decent technique, but others will certainly disagree. (I mostly ride fixed, fwiw.) Regardless, it's of little relevance to touring. When you find yourself whooped and riding with additional weight, the advantages of a freewheel (and multiple gears) become abundantly clear.