My hook rod hangs on the garage wall. I gave up on it years ago and adopted the step stool method for the following reasons:
1) As you found out, sometimes the wheels and road latch are too tight or bind and the rod won't do the job.
2) You can't get the wheel latches tight enough to ensure them not coming loose while travelling.
3) The rod was always in the way in my bumper drawer.
4) I need the step stool anyway to extend the rafter rods, as I have a bit of a rotator cuff issue, why not ensure proper locking of the roll with the stool?
"If the women don't find you handsome, they should at least find you handy." - Red Green