Hey! I currently live in Fairbanks. I am a student there but my best friend is at Wainwright. When are you coming up here? You will be up here when it is nice so there isnt any rush to winterize it but when you get a chance it will cost you between 300 and 500 bucks. That includes a battery warmer, oil pan warmer, sometimes a trans warmer, an engine block heater, and a single plug that leads out of the grill. This should be done before mid-october.
I have only been up here since August but I have been to three shops. I currently go to http://alaskaautocare.com/
for my oil changes and witerization. I found this place because it was the cheapest. Expect full synthetic oil changes to be around the 90 dollar mark.
However I just found another shop that I am liking, they are called http://www.thedieseldoctor.com/
and they do more than just diesel work.
If you have any questions about Fairbanks, just let me know.