Absolutely do it like this and tie down with straps. Not tailgate up with tonneau holding in place. Foam is trickier but still tie down with straps. A camera on the end of the CT tailgate would work to maintain the backup camera.
I just dropped off my CT at the Tesla Encinitas, CA SC due to the HVBATT error unable to charge. Something my father stressed many years ago which I have always followed is always wait to purchase a new vehicle until all the bugs have been worked out. I've followed this advice with Jeep...