Thanks for all the responses, much appreciated!
So this post has definitely given me some ideas..
I was trying not to go through the "traditional" way of composing in ULF and was hoping for a quicker approach but I think I may have to go that route...
All the suggested ideas with regards to lighting the scene with flashlights etc etc would help in that scenario (and to a lesser degree if using the rear LCD of the camera). There is no autofocus options available, as the two lenses (both large format and Canon tilt/shift in my case) are both manual focus.
Thanks for the ideas, lots of food for thought...