@sambo6942

You can look at this discussion, very similar question:
Camping or RV parks and parking near Mayo Clinic, Arizona
https://connect.mayoclinic.org/discussion/arriving-by-trailer/
You can also contact Mayo's free Concierge Services for lodging information:
Here is how to contact:
• By phone 7 a.m. to 5 p.m. Central time, Monday-Friday: 507-538-8438
• Email: concierge@mayo.edu
• Online: Request Concierge Services: https://www.mayoclinic.org/patient-visitor-guide/minnesota/concierge-services

What time of year will you be at Mayo in AZ?