To Carl: I have my 98 Patriot Ticonderoga (37') wired exactly like Eric described in his great post to you. I installed mine many years ago and have the switches about one foot from the battery banks. I used one switch on the two chassis batteries and a second switch on the four coach batteries. Zero issues or problems. I just open the cargo door and flip the switches. Very easy to install. I would like to influence you. Back then, I purchased a small Sperry clamp-on meter (one that will read DC AMPS) that I bought at Menards for about $65 at that time. Now, I cannot fathom how any do-it-yourself person to not have one of these in their tool box. I use it for all kinds of things. Example here: If Carl wanted to know exactly how many amps or milliamps any wire was pulling then this is a piece of cake. Example: My Chassis battery set draws about 150 ma normal with everything but the added switch left alone and about 400 ma on the coach battery bank. If I park it for more than two weeks, I shut the switches off; otherwise, I let them on. If you do buy one of the clamp on units be sure to get a small one. The classic larger ones like the HVAC techs use are to large. And, be sure to get a digital one. It is simple to use. Hope this could help sometime.
Larry Fritz