Regardiing condensation, if you can make the case kind of air tight, maybe you can either fill it with nitrogen, make a light vacuum, or pre-dry the air inside

Regardiing condensation, if you can make the case kind of air tight, maybe you can either fill it with nitrogen, make a light vacuum, or pre-dry the air inside (I remember some tricks to avoid condensation in underwater cameras that consisted in storing it open in the fridge for some hours or something like that, to have drier air inside, I'll look for that again...)