As long as I don't ride in our river valley a triple really isn't required here unless we factor in winds and we calculated that on a good day's ride we could easily get in 6000 feet of climbing just by climbing an and out on our regular route. Most of the grades range from 12 to 18% with the steepest grade in the city topping out at 22 %.
I've climbed all of these on many bikes that have been fitted with doubles, triples, 1 by 8's, ss, and fixed and if you want to do it faster and reduce some stress on one's aging body the triple is the kindest way to go.