Sweep the existing chimney, stick a spark arrestor on top of it (if it doesn't already have one), replace the single wall inside, and throw a nice used stove in there. We're talking a weekend cottage in VT that's not going to be used all the time... Just burn seasoned wood and keep the chimney clean and you'll be fine.
If by chance you have access to NG at that location, that would certainly be worth looking into as well, but I doubt you have access there.
If by chance you have access to NG at that location, that would certainly be worth looking into as well, but I doubt you have access there.