JWR,
I’ve mentioned before a gizmo called a Generlink [1] which allows a lot of flexibility when using a generator for backup power. This device is installed behind your power meter and, depending on the capacity of your generator, allows you to power any circuit in your home via the selective use of the circuit breakers. It’s especially useful in that nothing has to be re-wired in the house to safely use your generator. It does require some planning for installation in that your power company will have to agree to it’s use and will probably want to install it, mine was installed by my local power co-op for free. Regards, – K. in Texas