Since JJ had his first trip to 711 and did very well I want to start taking him more often. Last time I had the BM come with me since it was a slow day but next time I'm not sure I'll have another person to come with me so I'll have to tie him... if that's "legal" in the driving world. He ties solidly, I've never seen him sit back on the rope or try to break loose and I've left him tied in the barn with the cart ready to go. No tying problems ever.
Another thought I had was to use the halter under the bridle as the "first line of defense" and maybe get him a neck collar God forbid he managed to get loose off the first line. There is a lot of traffic where I live and I don't know what I would do if he some how managed to get himself loose!