Are you set on making a traditional mead?
Given your timeline, this is what I'd do -
* Plan on making a sweet or semi-sweet still mead (about 3 pounds of honey per gallon - with your 6gal carboy, do a 5 gallon batch. So I'd do 15 pounds of honey.)
* Do the Kris England nutrient/O2 schedule
* Use your D47 - that's a good yeast. Hydrate it in Go-Ferm if you have/can get some
With 15 pounds of honey in a 5 gallon batch, you're looking at an OG of about 1.100 and a FG (using D47) of around 1.005, or thereabouts. That should take about 10 days.
Be sure your fermentation is in a place under 70 degrees, closer to 65 if possible. This is especially important with trad. meads since the higher temps will lead to fusel alcohols (making it "hot").
Rack it into secondary, let it sit for a month or so (or a week before you need it), then sorbate it. Let it sit for a couple of days and backsweeten to taste. You could probably do without the backsweetening, but even a small amount of honey (a cup or so) in a 5-gallon batch will really heighten the honey profile and improve the depth of the mead. That should do it.
It'll get better over time, but that should give you a decent, drinkable mead in 2-3 months. Don't dawdle.
