In Reply to: BIG BIG ISSUES posted by dallas on Saturday, 24. April 2010 at 19:00 Bali Time:
If you go to a physio they will be able to replace the casts with fibreglass ones. These are still not waterproof but are much lighter. They will also be able to organise waterproof covers for you, these are put over the cast and have a pump attached, you pump out the air then close the valve and they are completely waterproof.
I know this is all additional expense but will be well worth it as it will save every ones holiday. The brand of the covers is DryPro. Good luck