The models are pretty sturdy cardboard - I've used them quite a bit in other games without too much of a problem. They slot together pretty tightly so I rarely glue them, usually only use glue if the fit of a particular slot is loose.
I'll be running this game again at Historicon, probably on Saturday afternoon of the convention. I also have several ideas for other games in this setting - I think Frostgrave/Ghost Archipelago fits very well into it.