Recently, I have been running a Labyrinth Lord campaign with a group who primarily were introduced to D&D through 3rd edition. It has been an exercise in impromptu refereeing, on my part. I did not know what to expect, as far as a continuing campaign. As a result, I re-purposed a bunch of maps — I did not want to spend a lot of prep time on a campaign that might not last and part of me wanted to experiment with the concept. In fact, I have yet to use a map specifically created for this campaign. Interestingly, this has not hampered anyone's enjoyment of the game, and, as far as I am concerned, I've actually had more fun than I usually do as a referee.
For the curious, I am using a Judges Guild map for the campaign world, recast as a wilderness with the last vestiges of several colonies established by an empire that collapsed over a generation ago. The players began their careers in a town named after the fortress that protects it — Headwaters. It is the last stronghold of civilization, surrounded by a wilderness ruled by beings of Chaos. I placed several potential adventures, dungeons and megadungeons on the map, created a classic rumor table and had the players roll to see what their characters knew. After that, it was entirely up to them as to what they did — something they have come to really appreciate.
The area is sub-tropical and metal poor. This has put a premium on all things metallic and forced the players to be creative about how they equip their characters. More on that later. I've thoroughly enjoyed James' synopsis of his Dwimmermount campaign. In a similar vein, with an eye towards observing how 3.5 players adapt to old school play, I plan to write up my own synopsis of what I'll call the Lost Colonies campaign. Enjoy.
13 minutes ago