Skeleton, Dwarf and Troll farm with possible mass and cheap storage.

I was exploring an island off the mainland, and found a great spot where a Dwarf spawner was practically on top of a Burial Chamber.

I decided that I would leave the spawner, and build up the outside of the chamber as a small base.

I also decided that I would leave the skeleton spawner inside the chambers intact as well.

Instant dwarf and skeleton farm.

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Then, when I accidentally died inside the chambers, and I trudged back in to get my gear, I wondered if it would make a great place to have mass amounts of storage.. without having to waste mats?

Leaving one item in my death coffin, I was able to go back in and put other items in there.
If I die multiple times in here.. having set my spawn point just outside, could I have multiple death coffins to use as storage?

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Oh, and bonus.. there's apparently a troll spawn somewhere close-by.. as I've taken a couple of them out as well. Is there a way to know where they spawn? Could this be a three-way farm?