Well I might be able to help. I pull a 28' car trailer. I dont have a bathroom, but **** pissed I dont have one. Mine is tall-too tall actually. It is not what I do with my '18 3500 SRW, Duramax full time, but I do get around a lot with my car trailer. Three trips to California a year and many more trips to Utah and Montana. I pull a ZL1 which weighs spot on at 4K and the trailer weighs about 5-6K maybe a little more with all the extra stuff in it. Not a heavy trailer but it cuts more wind than my Fuzion does without a doubt. My truck is not as tight a new 2020, but I dont use any type of hitch system, I hitch and go. I cant imagine anything you would put in a 28' car trailer that would give a 2020 or my gen an issue.