I feel for you. I wish there were some other way to help. I transfer snakes to my vet in very cold temps (10ºF) in a snake bag inside a back pack with a reversed zipper (more water resistant) I have towels and such packed around the bag for insulation. I keep all cold air away from the snake as is possible. I have a few sets of 'snugglesafes' http://www.snugglesafe.co.uk/heatpad.htm they are amazing products but a water bottle would be the same.

I suspect that the stress is why things get worse, I have found with cases of RI that the stress causes a bit worse but this 'bump' passes after a few days. The drugs take longer to work that they do with mammals 'slower metabolism' my vet usually suggests 30 days and do expect to see anything for 10-15 days in the way of improvement.

it is so hard to be away from an exotic vet. I am super lucky to have a good vet close but sometimes a vet whom cares and is willing to do reading and work with you is better than one who wings it. I have always been given a very small needle a diabetic type.

I ask after the cause,as so many fix the RI but never repair the problem and it just keeps reoccurring. At least you know why and have solved the problem and prevented the re-occurance.

best of Luck,
Alex