Yup. Works great actually if one is cautious to keep other loads off. A significant one being the converter charger.
I believe on most AS's, one will have to turn off the 120V breaker manually in the trailer, that serves the converter.
In my '07 vintage 27FB, at the power center, it is breaker circuit #2. You can see the sticker below the breakers which lists "Cir.2 20A Converter-Desk Bedroom Recepts".
Counting from the left, this would be the 3rd breaker position, as the very first breaker position is actually the "30A Main" input.
I largely leave my converter charger off these days as I have significant solar to do all the charging. So I added the red switch to only turn off the converter.