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

In terms of the odor from steaming coolant leaks -- put some coolant, with antifreeze, in something metal that you can throw away. Heat it up to a full rolling boil. The steam coming off it will be very close to the odor that indicates radiator boil-over or coolant leaks.

Do this outdoors and definitely dispose of whatever you used to heat it up afterwards.