Surely a person who is working with a blind instructor can discuss strategies before they set about to work.
Dogs are soon able to adapt to the cane users.
Mine ws cane shy at his first convention, and, of course, if people are hitting him with it or getting it across our path, he is likely to treat it as a traffic check, but he's reasonably comfortable now. We do really need to communicate and work with mobility instructors to narrow the gap between the dog users and cane users, and we need to do the same with general cane users, too.