How often to disconnect from shore power

dodge guy wrote:
When plugged in the chassis battery does not get charged, only the house batteries.

Careful about oversimplifying - our Tiffin came from the factory with a trickle-charger connected to the starting batteries, so they definitely DO get charged whenever the bus is on shore power.

Electrical systems vary all over the place from brand to brand, and model to model. It's hard sometimes to make blanket statements that apply to them all for some aspects of their design and capabilities.