Arden Vul running Cairn; Cairn running Arden Vul; and Arden Vul - done.Looking forward to the oncoming threads: "What campaign should I use for a non-D&D focused dungeon," "what D&D should I use for a campaign focused dungeon" and "what focused dungeon should I use for a campaign D&D."
I haven’t played Torchbearer but also have heard good things, but I’m also going to vote for Dragonbane. It does classic dungeon adventures quite nicely.
Dragonbane has a lot going for it. While I generally prefer Shadowdark, there are enough elements of Dragonbane I want to steal that I should just cobble together a "Shadowbane" ruleset.It's also enough different from D&D and its derivatives that it feels like a fresh experience.