Backing 10' 2" splits

I am actually a diesel mechanic but I ran 6months pulling a rietnour 48 foot 10-1 spread. I think its easier to start on it because you don't know any better. Now any trailer is cake to back up (with the exception of trains). The dump valve is a blessing you take forgranted. I had it on the trailer I pulled but once inawhile I'd have to hook to the companys steel framed trailers with no dump and it just felt awfull for the first little while. Best advice on dump valve trailers is don't forget to reinflate the bags if not it will smash the bag pedestalls in a short time and you will be replacing both bags on that axle. Not hard for the company to figure out what happened.