
As I flew in on the sea plane I was not able to take my own fuel so had to rely on buying it at Windigo. It was a blue can that looked about right (now I know better for next time) and the metal ring on the top was the correct diameter, but the nipple was not threaded. I didn't see other options at the store. When I purchased it there was of course a plastic cover on top of the can so I didn't see the issue with the nipple. Somebody else at camp told me that the lady at the store at Windigo (Eileen?) told him "I hope you don't need the kind that screws on!" but there was not comment made to me when I purchased what I thought was the correct fuel.
Luckily, somebody else let me use their stove for my first meal. My plan was then to hike back to Windigo the following day to get either a different fuel canister or a different camp stove that matches the fuel so that I could trek across the Greenstone to get to Rock Harbor on time.
I don't know if this falls under "luck" or divine intervention" but I'll take it however I can get it. Long story short, there was a medium sized cansiter of fuel in the pit toilet with the correct type of fuel and attachment (threaded nipple) that was about half full, plenty for my solo-hike across ISRO! The thread was a bit rusty but my burner attached to it no problem! I continued on with my hike on Sunday as per plan, thanks to whoever left the fuel canister behind! I, in turn, left a brand new and full fuel cansiter (with the incorrect nipple) at the same toilet if somebody else could benefit from it and so I wouldn't have to carry an extra pound in my pack.
I did see that they had the correct type of fuel cansiters at the store in Rock Harbor once I got there.