For your consideration also I would recommend a rear view Camera for your Caravan or towed load. Works fantastic and very very simple to install. You can set them up for permanent On and run via a small 3.5" or 5" screen. You can also get a wireless camera these days that make it even easier.

Getting a kit with switchable 2 cameras allowing you to fit one the the back of the GQ and the second for the load and your on a winner for sure.