Even if the backup camera signal to the display screen is wireless, you're still going to need a power source for the camera itself. Assuming it's mounted externally, that will require drilling into the trailer and tapping into, most likely, the running light circuit with a short wire run. You won't have to run wiring all the way through the trailer. The camera will then operate whenever the running lights are on.
FWIW, Airstream included a Voyager wireless LCD monitoring system and camera as standard on my Classic. It provides both audio and video wirelessly to the monitor in the cab. Nothing special, but it's worked without issues so far.
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Mike
2020 25' Globetrotter Twin | 2024 GMC Sierra 2500HD Denali Ult. 4x4 Duramax
400Ah Battle Born lithium battery string | 580W solar (400W roof 180W portable)
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