I have read my owners manual. The only thing it says about the bypass levers is that you can move it with the engine off. It says no where about "transport position" of the hydro bypass levers. Unless you just mean "unlocked" position. It says to engage them forward to use normally, but doesn't say anywhere to not operate with them off.
I don't have much flat ground so it's more difficult to go around trees as I have a heavy clay content. I use 3 point turn around method and try to keep both wheels engaged to minimize wheel drag.