Wow -I really have no idea what to suggest, other than you will go nuts if the foods you need aren't available. Don't starve yourself!

Perhaps you can still participate in the eating there, but keep your portions really small (rice, etc). Of course it will throw your body out of ketosis, but you do have to eat!

I'd probably stock up on a lot of beef jerkey and nuts before leaving... and perhaps explain your situation to the people who own the house you will be staying at.

Good luck!