There's no doubt that the weakest link in the Slingshot brand is the dealer network. If you used that metric to judge the ultimate success or failure of the brand, it looks like it's declining and not expanding.
I don't know if I would sell the Sling under you're circumstances or not wjfyfe since I've only been to the dealer once (warranty swap on my angle drive) but, realistically, you are looking at two 800 mile round trips for one dealer visit (drop off and pick up). That is a difficult pill to swallow. But I love the Sling and it seems you do too. Tough call...
You hit the nail right on the head, SlingLow, thank you for your understanding!
Bill