Have a pre-assembly 'unconference'
Unconferences are open to anyone, have the agenda set on the day by the participants, have no budget, are usually held on the weekend, and therefore attract people who want to get things done/fix problems rather than because it's their job. I've had fantastic experiences with them in the UK
Peter Krantz commented
It would be great if it was possible for the unconference to use the facilities in some way.