
So by popular demand, my preferred terrain storage and transportation system for my 30cm sq tiles

By IKEA, the TJENA box with lid, black, 32x35x32 cm (width X depth X height)
http://m.ikea.com/gb/en/catalog/products/art/00263633/I don't use the box as purchased. I cut it down to 13.5 cm tall (under half height). This size will take a single 'high' tile (such as a cliff section) or two 'short' tiles (such as road straights).
As I have five tall sections (inn, fort, 3x cliffs) all 15 tiles will fit into 10 boxes (5 singles, 5 doubles):

For the doubles, obviously the tiles aren't stacked on top of each other. What I do is take the excess trimmed from the main box and cut it to create platform legs, with the main platform bed cut from the packing card that accompanies the box when bought unassembled in store. The two bed pieces (cut with opposing corrugations) are glued together and to the legs using the Evostik Exterior Wood Glue.
The platform insert upside down:

The platform inserted into the box:

As the single boxes generally contain the heavier tiles, I cut extra base insets from their packing card, which help reinforce them.
I'm therefore spending about £1.75 to protect each short tile and £3.50 to protect each larger one. I figure that the time and effort (and in some cases the materials) is more than enough to justify the expense.
Edited for wrong image link
Ps: don't forget that the short tiles have removable trees (they are plugs)