Wow, lots of great responses! Let me review some of these...
Thanks again for the responses. Any more input is greatly appreciated; right now I'm doing more research on your suggestions, and I'll let you know what I choose and how it works out for us.
- Three recommendations for "Of Sound Mind". It looks interesting, but it's for 3.0 and I won't be using Psionics. I'm worried that it'll require more conversion than I'll be able to do for this adventure...
- Two recommendations for "Sunless Citadel"; I'm still concerned about the conversion from 3.0 to 3.5, but if it's not too bad then I may end up running it. I'll probably buy a copy anyway, just since it's now a classic.
- "The Freeport Trilogy" looks really good, actually, and there's a 3.5 version! A couple of my players will even appreciate the Lovecraftian nature. Definitely one to consider.
- "The Lost City of Barakus" looks interesting, but definitely dungeon-crawly and probably a lot more complex than I need for this adventure. I will consider it in the future, though.
- I actually obtained a copy of DCC: "The Adventure Begins", and there's a lot of great stuff in there, and they're not all dungeon crawly despite the series title. I'm going to be going through them and seeing if any of them are suitable, though they do appear to be particularly short. If anyone has any recommendations for a specific adventure out of there, I'd be interested.
- DCC: "Into the Wilds" looks pretty dungeon crawly, but does get some good press. I'll probably get a copy of it to look at.
- "Mad God's Key" (in Dungeon #114) actually gets some kind words from Monte Cook, which is a good sign to me. If I can get a copy of it, this will be in the running - or at least ready for a future game.
- I've looked at "Whispering Cairn" (from "Age of Worms") and Paizo's "Burnt Offerings", and they both seem to be a little above my abilities. Maybe for the next campaign.
- "Hollow's Last Hope" I was already looking at because it's free. And for a free adventure, it sure seems to have some high production values! If the sequels are even better, this looks like a good path.
- I'll consider "Wreck Ashore" again. The introductory text seemed very bland, so I glossed over it. But DEFCON 1's praise tells me it deserves another look.
Thanks again for the responses. Any more input is greatly appreciated; right now I'm doing more research on your suggestions, and I'll let you know what I choose and how it works out for us.