What I did next to our home breaker box was install 3 outlets. They were directly powered by the breakers for the kitchen fridge outlet, kitchen lights, and master bath lights (and labeled as such). Directly below each outlet I surface mounted a 2 x 4 handy box. Out of those came a short piece of 12 gauge extension cord type wire (with plug) that connected to the house wiring for the matching circuit. These were normally plugged into the outlets above them. In case of power failure, I would unhook them and plug them into a heavy duty extension cord connected to the RV so they could easily be powered by the RV genny and there would be no possibility of back feeding into other circuits. This worked very well through many hurricanes. I like the idea of using the RV for emergency power as it is parked outside the house to protect against CO poisoning. Most RV gennys are quieter than the average home generator (except the more expensive ones).