I purchased and returned (gotta love Amazon prime) the RVS and 4UCAM. Both had less than optimal displays and required running extra wires, which is not easy to do at the back of a TT. Also had problems with reception.
I used the Sharx which only needs to be attached to your included Furrion connection wire. Installed a Netgear router inside the front of the trailer with power tapped off an overhead light. Total cost is about $325. A little pricey but the hi def display on the iPhone/iPad is better than any other I'v seen.
At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.
Vengeance 25V (the Harley needed a home)