What you can done on next day or night time, when you have free, just using some wet/dry clothes to mop the hand grip or the whole body.
If got some sand and used the air blower for keep it clean and continue shoots by next day.
The others solution can be used plastic bag to put in the whole body and lens into the plastic bag and left the lens head out with cover by filter.
I'm heading to Sentosa today and have resurrected my very old sammy sung PNS from 5 years ago. I will be carrying this instead of my DSLR. big and heavy how to enjoy the beach? some more I'm scared la. cos no budget for replacing
I stay in the east and my room face the sea, if a week at the resort will damage your camera, what will happen to mine? Camera are suppose to be able to take some salt and water. Just don't abuse your camera and it will be fine.