On work trip, what can I improvise to protect gear from rain?

Visting a coffee plantation with clients. Brought camera along but we are expecting moderate to heavy rain. Most days it will be intermittent periods.

I've been able to gather some plastic bags and some rubber bands. But unfortunately we are staying in a rather small and modest village and don't have a lot of options to go for help, just local and artisanal stores.

What's something I can whip-up? I would hate to have come all this way and not be able to do my job due to an unforeseen forecast that even the locals weren't predicting