"One of the real challenges of ownership in my area is finding high quality service. I am in the Charlotte NC area and it appears that our nearest dealer is in MD. Although several locals claim to provide top quality service NONE are Ranger Tug authorized. I'm wondering how others handle this situation."
I'm in a similar situation. The closest Ranger authorized dealer is so far away I don't even know which one may be closest (I knew this before buying). It would be nice if one was close by, but it really only matters for warranty work - and even then Ranger may work with you and a more local repair facility for warranty repairs.
If you think about it, the only things "Ranger" on your Ranger Tug is the hull, wiring and plumbing design and installation, and the interior (wood, cushions and coverings), etc. All systems are designed and built by someone else (Yanmar, Dometic, Garmin, Raritan, etc, etc) and just installed by Ranger. So, these systems are not Ranger specific anyway - any qualified technician is as good (or bad) as a Ranger authorized facility. Yes, there would be a small learning curve to determine wire routing, for example - but even then, Ranger does a good job at labeling their wires.
So what I'm getting at is, think of your boat in terms of it's systems. The big one will be if you need Yanmar engine work, you may have to find a local Yanmar authorized repair facility. If you need A/C work, then go to the local authorized Dometic repair facility. Garman? - same thing. The only thing you miss out on (and it may not be a bad thing) is the convenience of a "one stop shop". You'll probably find that you need only a few good shops in your area that each are know to have a specialties in. Or you may find that one shop that you like who really can do it all.
So far, I've done all of my troubleshooting and repair work myself, except I did take my boat to an authorized Volvo dealer for its first maintenance, just to get it on record for any future warranty purposes. They had access to Volvo's computer system which I could not get access to.