Ashabenford would be a good place to start as it is nicely described mapped in the FRCS.
As for the characters,
- The dwarven cleric has arrived via the Underdark passages that reach from the Great Rift to Glen. He accompanied a group that is going in search of the legendary lost mines of Tethyamar, which provides a hook for an adventure/mini-campaign later on. Of course, the reason that he does not continue with his fellows is that his faith makes him something of an oddity.
- The paladin of Tyr is new in town, seeking out the Tyrran priest, Nerval Watchwill, to see what aid he may render.
- The rogue has arrived in Ashabenford as a guard/scout for a caravan en route from Hillsfar (or further afield) owned by the Black Eagle Coster headquartered in Asahabenford.
How to throw them all together? What if they arrive at the same time as each other, which is also the same time as a band of orcs arrive (the Riders are off chasing drow). The orcs' tracks can later be followed to Galath's Roost and the Dungeon Adventure, "Raiders of Galath's Roost", can be run. Alternatively, swap the orcs for goblins, have them attack an outlying farm and send the party off in search of the Sunless Citadel (just make a couple of changes to give it a Moanderite theme).
Anyhow, just a few thoughts.
Cheers
NPP