"The Enchanted Pilgrimage" by Clifford D. Simak is one I liked. There is another similar story by Simak, name escapes me at the moment.
For somewhat of a reversal of the tropes, try the "Time of the Dark" series by Barbara Hamby. It has civilization stuck in the "dungeons" (for a good reason) and venturing out into the wild world. Her "Sunwolf" books are more episodic, almost Conan clones in some ways--sparkle in places, but uneven stories that sometimes don't seem to really go anywhere. Where she brings it all together for a good, single novel is "Dragonsbane".
With Dennis McKiernan, I would start with "Dragondoom". It is much earlier in the chronology of Mithgar, and more "original" in plotting than some that comes later. Plus, McKiernan writes with an odd narrative "voice" in all of his Mithgar books. Here is a chance to find out if you like it or hate it in a one-book story. Also of interest is "Caverns of Socrates"--not written in that Mithgar voice at all, for a sci/fi twist on a mainly fantasy story.