There is no way the cleric will be able to show his face again in Hommlet if he values his life. The cleric and halfling could continure the adventure against the cult, but they are going to half to find out where they are hiding without going into Hommlet. I may drop some hints in Nulb or the old Temple if they decide to go there.
The fighter's player won't be able to play for the next month or so, so the fighter will convieniently rot in prison for awhile and then be kicked out of Hommlet. After this he can try to find the rest of the party if he so desires.
This is pretty annoying, it will take some work to get things on track, and or modify the campaign to allow for play styles. I may just have them wonder in the wilderness, endulge in some boring hack & slash and constant onslaught of bounty hunters, monsters, etc. until they decide they're ready for something else. I figure, why prepare, when it's all going to go down the tubes anyway.
Zouk'