For train riders, or anyone else commuting over a considerable distance, it pays to cultivate friends along the route. Develop a friendly, trusting relationships with persons and businesses along the way and it is simple enough to entrust them with a foot locker or other suitable container that might be stuffed into a corner, or placed above a drop ceiling, and forgotten except for the twice yearly restocking.

Of course the nature of such relationship is highly variable and entirely up to you to negotiate. It could be anything from a friendly, but strictly business, relationship where you pay for the space used.

Or it might be a reciprocal 'couch surfing' arrangement where, subject to approval, either party might save time and money by relatively casually crashing on the others couch. Such relationships can be mutually beneficial, but not without potential conflicts. Many people commute and regularly travel to work or regular meetings. Having a place to crash, and in return providing a place, can make travel, and emergencies, much easier to cope with.