Back in November I mentioned some time objectives. One of those was to be able to fit the whole event into 4 hours, with 3 hours of play. Implicit in this is the expectation that the game would be played on a club night, so set-up and clean-up have to roll into this time.
So, one of the objectives here has to be a way to dress the table that looks OK for a game, but easy to transport and set up. To quantify that all required terrain must be able to fit into a backpack that can be transported by public transit.
That does not rule out grander constructs, but the design of the game cannot required them in order to work.