If there is a local spay/neuter release program, find out who the volunteers use as a vet. PAWS was a good resource for us and although the membership used quite a few different vets, they pretty much all stood behind one for critical care.
Make sure your vet is comfortable with the instructions from your breeder. If you plan to feed raw, they don't need to be an advocate but they need to be accepting of it.
Also, for first time kitten visits, contact your vet's office and see if you can make an appointment just to hang out in an exam room for 30 minutes. Play with your kitten, have them meet the vet and if all is going well perform the initial examination. If it's not, make sure both you and your vet understand it's better to pull the plug. If they afford the extra time to make sure you had the opportunity to make your kitten comfortable first, and a positive first greeting with the vet all should go well without need for a second appointment.
While I don't think Savannah's need any special treatment, I do think there is one important thing to communicate with your vet. Special thanks to Brigitte for pointing this out as well as it went a long way in explaining all the anecdotal information out there in regards to vaccinations and anesthesia. Quite simply, express to your vet that Savannahs are an extremely lean cat and require lower dosages of fat soluble medications. It should make immediate sense to them, provide some clarity on the breeders instructions and will keep you from looking like a kook fresh out of Dr Google's office.