I have the sequel to
Raiders on Galath's Roost. but have not run
Woe to Mistledale. I have not run the first part of
Galath's, but have recently conluded the second part (where it gets nasty).
I ran a modified version of it which just wrapped up last week. The party was 8 PCs, but they were equal to the task. Only one dicey part in terms of danger to the party, but it did get touch and go when they got webbed.
Details of how it went are here in my high tech campaign log:
http://www.dladventures.com/gallery/public/DL_log4.pdf
The relevant parts are at the very end of Session 2 as well as all of session 3 and 4.
I like Skip's stuff, not because it is particularly brilliant - it usually is not. But his material is always competent, well put together in terms of rules compliance (funny about that!) and - above all - I find his stuff very adaptable and easy to modify.
Chris Perkins and Wolfgang Bauer are better authors in the compelling plot sense. They have stronger villains and better story arcs. But as a consequence, their material is more difficult to modify.
Skip does "genericized" very well. I add the flash and context, he inspires basic mechanics. It worked well for me with
Galath's Roost.