Let the dogs do their job without giving them instructions, playing with them, or petting them. They are permitted to enter any public facility including restaurants. A cane is part of an individual's personal space. Do not touch or steer a person's cane. People with vision loss have individual needs regarding how they best receive information.
Large print is only useful for people who have some vision.
Not all visually impaired people use Braille. Many people with vision loss prefer to receive audio-taped information. Ask in advance to confirm preferences and needs. Address questions, comments, or concerns directly to the individual, not to a person in their presence. Let the person know if you move your location or if the conversation needs to end.