I have a six hour game slot at Planet Comicon in Kansas City, MO on April 28th between 4 and 10.  (shameless plug, but contextually needed)

What I have is a large Cave System / Dungeon crawl idea, but I need some advice:

What SHOULD I use for a six our one time session?  This is for Salem World (1d8 Game), set on Colonial America in the Early 1700's.  It has Magic and some Fantasy elements to it.  There is a random Dungeon Generator in the Main Book, and Random Monsters / Encounters tables to use.  For the nasty side of a GM it has random pestilence and Common Diseases of the 1700's charts.  Everything a growing GM needs.

So, on to the play date...  is a good dungeon crawl what you expect at a con or something deeper?

Are you running a playtest or a demo?

Are you giving away any freebies?

What kind of adventure best showcases what is UNIQUE about Salem World?

Here's some quick con game advice
1) Pregens are mandatory. I run OD&D and Traveller and "just rolling up a character" is a wasted 30 minutes.
2) Have Players + 2 pregens. AKA, 8 PCs for 6 players.
3) You will plan too much or too little. If possible, run the event at home first with friends to get feedback.
4) The adventure needs a Beginning, Middle and End in those 6 hours. There is NO see you next session.
5) If you're not running Pathfinder or 5e, you need to advertise your game around the con. Shameless plugs are your friend. Make sure you have a great blurb in the con book.
6) It's cool if your blurb says free snacks and/or prizes. I do that for demos and playtests to entice players.

One shots are my favorite RPGs (FOR ME, best ROI on time to fun) and I've run con games for soon 4 decades. Feel free to ask more specifics!

1) I did a brief "dungeon crawl" thing at the last con I was at. I think the people that played enjoyed it. They were small dungeons built with those WOTC dungeon tiles.

2) I would skip diseases for now - that is an... acquired taste.

3) I would include a "dungeon" that is colored by your setting. Maybe a shipwreck that gives way to a sea cave complex in the lower levels? Some undead pirates, some weird sea-based creatures...  Of course, the treasure from the cargo hold was absconded and offered the "big bad" in the largest cave at the back of the complex.

Quote from: trechriron;9565341) I did a brief "dungeon crawl" thing at the last con I was at. I think the people that played enjoyed it. They were small dungeons built with those WOTC dungeon tiles.

2) I would skip diseases for now - that is an... acquired taste.

3) I would include a "dungeon" that is colored by your setting. Maybe a shipwreck that gives way to a sea cave complex in the lower levels? Some undead pirates, some weird sea-based creatures...  Of course, the treasure from the cargo hold was absconded and offered the "big bad" in the largest cave at the back of the complex.

Given you can end up with mixed experience folks, this sounds good.

The first dungeon I ran a friend through using DwD Studios BareBones Fantasy were the caverns from the free Decahedron magazine http://www.drivethrurpg.com/product/109054/Decahedron-Magazine-1 and I threw in a very weak dragon at the end. There wasn't too much social interaction role-playing, but it gave them experience with skills rolls, exploring, and how combat works. It worked well, since they were mostly concerned with learning the mechanics for the first adventure.

With the great advice given, I am leaning toward a Trip inside the setting's infamous Prison called the William Stoughton Penitentiary (W.S.P or the Wasp), a solitary confinement Prison in the Pennsylvanian Colony.  I will have at least a map, and several underground levels to explore.

It will give hours of exploration, and the ability to make any door the last room before the exit in hour six.