Hard pad is the folk name for Distemper as far as I'm aware. I wonder if they just got mixed up and meant Parvo, Distemper and Lepto?
From what you've posted on this and another thread, they do sound a bit odd TooOld.
Is there anyone you local can ask for a recommendation? If not and you have a good relationship with your vets, I would ask them.
If I were you I'd visit a few before making a final decision. You can tell such a lot from a visit and you will usually get a good vibe from the right place. We spent ages a couple of years back visiting lots of local kennels hoping to find one nearer to our house, but couldn't find one that even came close to the place we use.
Only fly in the ointment might be that it's getting very late. Our kennels are booked up for the summer months in advance - in fact one year we lost out because they were already booked up by the previous Autumn. They only take bookings in excess of 7 days in the summer as well, as they're so busy they don't have to worry about turning people away.
That said, just because they're odd, doesn't mean they won't take good care of your boy. Some of the quirkiest 'dog people' I know are also the ones I'd be happiest to leave my dogs with if I had to.
Best advice is to trust your own instincts and ask around what other dog owners and the vet think about the place.