For someone completely unfamiliar with this modules, and only vaguely familiar with the novels, what would you say is the one thing in these modules worth pulling out and plopping down into an entirely unrelated campaign?
That's easy:
the maps.
The adventure maps for virtually all of the first two thirds of the series are brilliantly inspired and heavy in atmosphere. They are as follows:
DL1-
Map to Xak Tsaroth: The ruins of a city that have been swallowed by the earth, party turned upside down and in a vast cavern below ground level.
DL2 -
Map to Pax Tharkas: A keep astride a pass, featuring a central mechanism which drops an improbably large block of stone which seals off the pass. There is a secret passage and small dungeon below the keep which provides an interesting entrance into it.
DL3 -
Map to Skullcap: A Wizard’s lair that has exploded in a colossal event in the past, leaving a twisted and melted ruin beneath. A final boss battle with a mechanical hydra located in a maze of invisible walls can save or damn the party from breath weapons.
DL4 - There are some dungeon geomorphs to Thorbardin, a Dwarven city that is on the scale with - and more complicated than Moria. These are interesting and useful - but ultimately, anything that big is difficult to actually use.
The Map to Duncan's Tomb is a floating castle/Dungeon ripped from the ground and hovering hundreds of feet up in the air. Repurpose the map for whatever purpose your heart desires. I have used this map several times in other unrelated campaigns. It's a great map.
DL6 -
Map to Icewall Castle: The lair of the BBEG, carved from a glacier, complete with secret ways in via tubes in the ice created by - and still inhabited by - Remorhaz.
DL7 -
Map to the Temple of the Dragon: a Huge Temple to a dragon, resembling a dragon carved from Stone and set in to the side of a cliff. Epic looking - though perhaps not as much fun as the earlier map designs, despite its epic appearance.
DL8 -
Map to the Tower of the High Clerist: A castle that is nearly 800 feet tall, with level after level after level of floor map designs and layouts for you to fill with whatever your heart desires. Still the largest published Castle Map of all time, AFAIK. If you wanted to run the whole damn dungeon as one campaign - 1st to 20th a la WLD, you easily do so. As the lair of your BBEG and the last dungeon crawl of your campaign? This is
>>Da Shizznit<<. I have often re-used sections of this map in other campaigns. I don't think my players ever recognized it either. It's a MASSIVE castle. The module itself does not even pretend to detail less than a few dozen areas. There are Hundreds and Hundreds of area in the thing. It's MONSTROUSLY HUGE, okay?
The maps in the later adventures are also good - though not nearly as good as those that appear in the first 8, imo.
The thing that grabs me with DragonLance has always been the production values in the maps. Most were reprinted in one form or another in the Atlas of the Dragonlance World as well - which is actually going for pretty cheap on eBay these days. The number of copies of each these modules that TSR was selling at the time was
ridiculously high by today's standards, and as these were the flagship products of TSR in the mid 80s, they sunk a lot of time and money in to making these maps. They have stood the test of time. Even today, they are among the finest FRPG maps ever made, imo.