5-heck with a 22-30 you can do pretty much anything. I used a 24 granny-30 for most of my trips and my low low didnt get that used , but sometimes. Nice to have, steep parts of Pyrenees Mtns, or down West Coast of States. Depends on what sort of weight you are taking on bike though, I was pretty careful, maybe had 40 lbs.
Essentially, having really low gearing is great even if you dont use it, its when you dont have it and you wish you did thats its a problem. If you dont use it often, who cares.