I towed my 30ft 5th wheel 9" out of level for a year with no issues at all and was loading it with 2 big Harleys. I have since raised it with 2" spacer blocks so its still somewhat tail down but I'm not going to worry about it. In a perfect world level would be better but we all know we don't live in a perfect world! I had people say your frig won't run...no issues, had people say to much weight on rear axle, if it didn't have weight equalizers on the springs then maybe I'd worry but most all RVs have them so in my opinion no issues!!