I would go with the triple and in the future, if you are making a steady diet of this I would put an MTB triple on the bike, no need for big gears when climbing. On observation I have made though, there is no substitute for the ability to put out watts on a continuous basis when climbing. A lower gear will allow you to put out fewer watts and still turn the cranks but you won't get you up the hill faster. Find your ideal climbing RPM and choose your gearing to match that and the hill, where you put out the most watts on a continuous basis.