How many of us are there? Owners of Dodge based RV's?

Welcome!

You'll need to know who actually manufactured the coach, like Honey, Concord, Titan, Champion, Winnebago, etc; Dodge only made the chassis.

Other than that, you easily can find operating manuals for the different appliances in the RV just by searching the make and model of the heater, water heater, fridge, generator, AC, converter/charger, etc.