As I have mentioned before, over the years I have very rarely used a published module and, when I do, I heavily modify it. The exception has been that over the last few years at Halloween the players all make one-shot characters and I run a classic module.
Then there is Expedition to the Barrier Peaks.
For a variety of reasons that could fill a novella in the Winter of 1980 through the Summer of 1985 I DMed Expedition to the Barrier Peaks about 8 times, never for my own "main group" and never canonical in my own setting. Just one of those things.
So this year the Halloween adventure was Expedition!
The players all took last Friday off of work and we started Thursday night and played 4 hours. Then 6 on Friday, 6 on Saturday, and 4 on Sunday, wrapping up the module in a grand total of 20 hours that included breaks for meals (I got a new smoker and we blew through a LOT of meat).