Bloody hell, how awful. I am keeping fingers crossed that the insurance money is there for you ASAP. So sorry to hear about all this, especially as you were so looking forward to this trip, but glad that the medical crisis is over.
As for cameras, I think I'd cart 3 cameras with m. The one and camera I took on a year-long jaunt went bagarap the second month of the trip, but I didn't find out until I got home and had the rolls developed. Only about 25% were viewable, out of 75 rolls.

