Cellars are for hoarding. What else to call goods bought years in advance of intended use, if used at all, stored beneath ground with tuberous vegetables for the winter?
The main consideration for a cellar is money as a cellar is a hedge against the future,and one can only project future needs by current. But current needs change, and thus so do the needs of the future, so we again return to money. How big a cellar is big enough? (Of course for Harris, it can never be big enough.) But again a cellar is a hedge, and being prudent, and for any pipe smoker worth his salt, it really should be twice as much as calculated for the remainder of a lifetime. Once you get to that size, a cellar is measured in orders of magnitude three, five or ten times as much.
If you have more than you need, you won't run out. Isn't that what a cellar is about, plentitude in times of scarcity? Could be that the Indians rise up and leave the reservations to murder the arrogant whites who have sullied the pipe, smoking it outside of its sacred, tribal past, etc., etc. If they take your head, that's a lifetime of scarcity, and in which case your cellar won't be of much use. Be does that really matter? Be prepared. Cellar!
Before we leave the cellar subject, it should also be said that one should take no heed for the disposition of one's cellar, unless of course you have a bud who gets all of it. If so he's likely to be with you during your last days, holding a pipe to your mouth so you can take a few draws and then your head as you hack. You'll know. Surviving family won't have a clue. They won't even fight for it, which is saying something for the disreputables spawned by most families. No, they'll likely carry the 500 ibs to the curb, all of your careful, ongoing work to cellar destroyed in an hour by your relatives and the garbage crew.