I don't vaccinate my dogs anymore, nor do I deworm them. They've gotten their puppy boosters when they were pups and that's it. I declined both their rabies and bortadella (kennel cough) vaccines during puppy boosters too, they just got the parvo and canine distemper. Here in Canada, though, rabies vaccine is not required, and the kennels I often to bring my dogs to when I'm on vacation prefer dogs don't have bordatella vaccine either.. for good reasons. Our climates here do not allow most worms or viruses to thrive.
Its a personal choice, and no, I do not believe they are necessary.. but that's my opinion, and my dogs have proven me right about my gut feelings on this so far. I don't much believe in vaccinations.. I don't get vaccinations myself, so I don't expose my dogs to them either.
I would like to bring my dogs one day to our property in Florida, and at that point I know I will have to break down and get them vaccinated, but it will be a one and one time only thing for sure.