Should you unplug your trailer lights or leave them plugged in when launching? There are definitely pros and cons to each. The best answer in my opinion, buy some tall trailer guides and mount pole lights high and above the water, make sure to have a solid run of double insulated wires from tongue to the top of the guides and you will get years of service. If this is not an option then see below from Sea Tow for their panel of experts opinions…
https://www.seatow.com/BlogList/international/2017/3/Trailer%20Lights%20Plugged%20or%20Unplugged