Thank you members for sharing your great suggestions. I think that the patients, themselves, are one of the best sources of practical information!
I think that you will find that the people in Rochester are very aware and supportive of the medical needs of the patients who spend time in the area. So you just have to mention your dietary needs.

I want to add an additional resource to this conversation: An update on the free Concierge Service at Mayo Clinic. Formally concierge services were largely limited to the Rochester campus. now visitors to any of the 3 Mayo campuses can get help with initial travel questions .The concierge service has recently added Live Chat. Now you can chat with a live person about preliminary travel questions.
Here is the link to the live chat service in the online Visitor's Guide - https://www.mayoclinic.org/patient-visitor-guide

I send you my thoughts as you embark on your journey.