I bought one of those butane stoves in Chinatown for the wife to use while we renovate the house. It is frigging awesome! A brand new one in a plastic carry case ran me $20. The butane comes in pack of 4 IIRC. I think that they were about $5-6. We have it sitting right below the '50's style wall-mounted exhaust fan on a table. It's Perfect. If no power, we would just take it outside to use to be safe.
Another thing from Chinatown are non-refrigerated sauces. We use sweet chili, soy, banana ketchup, and fish sauces that don't need to be stored in the fridge. Those will go along way in flavoring up your rice and beans.