You are not crazy and are actually on the right track. we will be doing the same thing with our RV. Our house is wired for an external genset as well. I believe it is the amperage draw at the auxiliary panel that you should be concerned with. Household electric panels are rated in Amps, ie 100 amp service, 200 amp service etc. If your generator does not produce enough amp output to meet the well pump amperage draw requirement it will not kick on and the generator will fault into over load. This will cause a high heat situation in your panel as well until the either a breaker trips or the gen goes into overload fault. either way, not a good situation. Check amp draw on the well pump vs amp output of your generator on the rv. Keep in mind, lights, refrigerator, furnace blower will draw amps as well. Hope this helps
