In answer to lankeela - most standard courses in the UK include a vaccination against Leptospirosis. And I sincerely hope that your advice in one of the previous posts was a joke, as forging a vets signature, or pretending to be one, is an offence by law!
Having seen many, many animals vaccinated I have only seen one severe vaccine reaction in dogs. Mild reactions e.g. slight temperature, feeling off, etc are normal and expected - they show the vaccine is actually working. The reason a lot of vaccines are boosted every year is that we have to work in accordance with what the drug sheets say - which is every year in many cases, and three years in others. Kennel cough is the exception, as that is a 6 monthly or yearly booster. We're bound by the rules even if others don't want to follow.
In answer to the original question, find the kennels you're going to use and ask them what vaccinations are required. After seven years you will need to start a new vaccination course. Don't forget to get the kennel cough one too, as it's a separate one.