Ironically, the need for a track to run live steam etc on is the most visible element of most societies grounds. Where a Traction engine needs only regular ground to run on, and stationary displays and machines etc need a bench, live steam locos etc need a track/tracks for running, and space to lay them on. It becomes a focus of the society both positive and negative, as all members should feel the need to help their society thrive through volunteering time and effort to build and maintain society assets, but it must not become a divisive experience for members.
I have experience of an enthusiastic member offering to level parts of the socoety's raised track and then being critisised for doing it wrongly (it was a minor job). We lost an active and up to that point enthusiastic member who was trying out a number of model engineering disciplines.
I would also caution against allowing areas to become the preserve of cliques within the society's membership, and also do not allow personal property to be stored on site except on a temporary basis (for events and sale on to another member as a place of transfer) as these will also become divisive issues. I know it is the weakness of the whole membership to let these things happen, but they have happened and can do in other clubs if member are not careful:O)
Sorry to be negative Bee, I want Exeter club to be fresh and interesting to all members and to be a place to be excited about, but without any of the nonsense that can become.