Stubbs would point out that the thing to do is to have close-loop focus from the guider. It would take a few month to implement. Of course, this requires a properly collimated telescope, since you're focussing at the edge of the field. When outside temperature is below the internal dome temperature. Remember that with 24 hour warning, the site can allow observers to use afternoon hours the vast majority of the time.
Observatory attempts to open telescope as early as possible in general, unless otherwise instructed.
More work is on-going to understand why the focus does what is it does, a number of things that need to be checked, temperature sensors, etc. Again, see the discussion of this issue in the Sunspot meeting minutes. We are clearly not doing a poorer job than those observatories which do no more than go outside to shine a flashlight. We need a dust working group to think this through in some detail. Turner should go ahead to charter such a group in order to come up with some recommendations.