I use the tailwheel towbar on my Cruisair; however, I have an eight-inch tailwheel. No problems clearing the rudder. The plane is heavy, and it does take some effort to move when in the grass.
The tow bar (in message above) is too long to be stowed in the airplane. I made my own towbar, much like this one, but I made mine foldable so it can fit in the baggage area. It was about $40 in parts from Home Depot.
Regards,
Allen