With the R-Pod, I put my Weber Q (propane) into a large black trash bag, and put it into the camper. I never had a problem with smells. I always made sure to remove the disposable grease pan before transporting.
For the R-Pod, I bought a Y-adapter for my propane tank so I could didn't need small 1 pound bottles. I connected directly to the 30 pound tank.
On my new trailer, I am having an outdoor propane quick connect installed on the entry way side for connecting to simplify it. I still will have to wrap the grill in a large plastic trash bag. I like the idea of storing it somewhere else, but there is no pass through storage or under carriage storage, so inside it goes.