My new trailer is pre wired for power to a backup cam. Is there stereo units that will receive wireless cam signal?

 

I don't know for sure of any aftermarket power head will receive wireless camera signals, but I'd bet money there's a way to do it. Have you called or chatted with Crutchfield to see their opinions or what they can do?
Great customer service, wide array of products and, if possible, they can fix up a package that works for you. I've checked around and while you can find the same products a wee bit cheaper, across the board when they combine everything together in one shipment Crutchfield wins every time.