I've got pvc guide posts on my trailer that are at 102". I could probably come up with some sort of flag that sticks out a little wider off of them and see them when backing. Actually backing up isn't my biggest concern. It's the big motor coach with a trailer behind it being able to swing around in some of the tight turning circles at various boat ramps. And then a big motor coach bottoming out as I go from level ground to the ramp.
My other concern is the drivability of shorter Diesel Pushers. From what I have read all the weight in the rear can make the front out of balance and they can be all over the place. How does a Super C ride and drive compared to a shorter Diesel Pusher (35 to 36 feet)?