If indeed you did a hex-based system, LOS would be a big factor and should be
>Let me clarify: one proposal is to make "forests" and "plains" interior
>features. These things might even be tardis-like subregions that you
>could enter and move about in. What do you think?
I like it. You should only be able to see the general parts of the location
until to get into it.
>What do you think of making castles and the like more proper "locations"
>that can be entered instead of being stacked with?
I like it, except that it would take a game "month" to move to each level of
the castle, which is quite a bit of time (or quite a big castle :)