the clicker method is a WONDERFUL idea...
even if u do tire yourself from it and stop using.
pick it up again, u'll be amazing at u'r dog's reaction once u start clicking all over again!!
as for a body harness... I'm not keen on believing these work. when Chocolate was younger, he would walk on his back legs...
not something I ever wanna go back to.
I choose the Gentle Lead WITHOUT a retractable, ANY DAY for two VERY self-motivating dogs.... lololol