Disclosure: I've never made maple wine, but I've been thinking about it for ages since my wife's a Vermonter and she would get a kick out of it.
I think you are going to want to treat the maple syrup like you would honey in a batch of mead. To get the most maple flavor, you should look for Grade A Dark Amber or even Grade B. Basically, you will add your maple syrup, dilute with water until you hit 1.090-1.100. Make sure you add yeast nutrient, and aerate the syrup.
I would pitch something like Montrachet which should peter out at ~13% or a D47 (~14%) since it's supposed to work for mead. You could also look at a mead specific yeast and bump up the OG a little further. Once it ferments out (and it may take some time), you'll need to see how sweet it finished. You might be fine or you may want to back-sweeten a touch.
It may behoove you to check out the mead forum since they would be able to give better advise on working with high sugar ingredients.