I shall think about an alternative venue.
From my perspective the location of OFFDEM is nice and informal and with interesting people present.
This may be advantageous for me.
Id be content to have the rig setup early in the day, so that people can casually peruse and play as part of the breakout room (volume permitting).
I trust there would be a secure lockup room (either for caching until after the weekend or to permit people to play music during the Sunday)?
On a similar note, I can do DJing during the launch party at Caldarium if you desire:
Under such circumstances I would definitely need help moving the equipment across between the sites (which I would be able to perform either immediately afterwards or during the daylight on Saturday).
Similarly, Id benefit from volunteering to help me bring my equipment from my home and back.
Regarding your decision to grow your event numbers organically I completely understand.