I'm halfway down this road myself having just wired up a BC-30 into the tailgate on my Sierra. Now looking at doing the same on the TT.
Outside of the usual where to mount and where to get power from, I suspect we'll both wind up chasing the Camera Extension Cable kit. It's a 50' extension cable that gets the transmitter closer to the GPS head unit.
Nice thing is, depending on the specific Garmin unit, it can support up to 4 cameras. However, as it is wireless, the signal isn't quite in 'real time.' Not super noticeable when just scanning behind a vehicle. But definitely noticeable when using the camera to get on the ball. The tongue inches along, and then all of a sudden it's 'there.' Got used to it fairly quickly though.
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2020 Winnebago Vita 24F
*****
2024 nights camped - 15
2023 nights camped - 28
2022 nights camped - 33
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