Hi Dave, We're 15+ year Winter Texans (don't call us snowbirds, please) whose use of medical care has evolved as we age. Initially, we moved around quite a bit and relied on Urgent Care for our needs. We still get our primary care from providers near our permanent residence, and try to "squeeze in" all routine care and care for chronic conditions while there. Recently, we have found a primary doctor near our Texas home, and also connected with a couple of specialists as needed.
One thing I want to stress - if you are on Medicare, or when you reach Medicare age, be sure to get a policy that will cover you in your travels, and not just for emergency care. Also one that covers as many providers as possible, and nation-wide. Many people don't find out until they have an emergency that their insurance has limitations - for example, some policies will not cover a flare up of a chronic condition as an emergency. Or they get surprised after the fact by a large "out of network" bill.
Also, figure out how you are going to get refills on prescriptions - either by use of a company that has pharmacies nationwide or a mail-order option and always keep at least an extra month or two of meds on hand.

All that said, enjoy your travels!