Just wanted to pop in and say that AKC does not have a therapy dog program, so an AKC title will not make him a therapy dog. You're probably talking about the CGC which is a great first step for therapy dogs, but organizations like the Delta Society and Therapy Dogs International are the ones that can certify therapy dogs and what most hospitals and organizations want to see a dog have before being allowed to visit.
Keep in mind that many facilities do not like dogs wearing big harnesses/vests because they interfere with being able to pet the dog, could be abrasive for sensitive children or adults, etc. I know around here cute bandanas are much preferred. May want to call around to places you plan to visit beforehand to see what they prefer.
Good luck on training!