The other common item that is normally directly connected to the battery that would bypass the disconnect switch is the inverter. Even when the inverter is switched "off", the remote panel is active. I wouldn't know if there is any current draw when it is not in use.
The main reason for the space heater is to control dampness. Also, if outside temperatures dip below freezing, it would be nice to warm the trailer. It may be overkill to use a heater. I guess I will have to decide over time whether a heater makes sense.
We've used one of these in our trailers for years: https://www.davisinstruments.com/product/air-dryr-1000/ and have been happy with it (I also have one in an outbuilding where I make my soap). We do leave the cupboard doors open in the trailer so that everything is somewhat warmed.
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Jan We do not remember days, we remember moments.
- Cesare Pavese
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