For what it's worth so late in this post, all my horses are trained to do both. They started out as direct reined, then progressed to neck reining. Leg pressure came after they mastered the other two. I also have out of state riding friends visit but didn't want to trailer to me for just a day...
Love the ear biting trick. I have an Appy that always tossed his head up and down when he couldn't be in front of everyone. I started popping him on the head between the ears everytime he started. He totally quit doing it after about four trail rides. Same thought process as the balloon.