How do you unlock more characters?

[The_Professor]

I only found the alchemist in the prison wagon, how do you unlock the others? thank you in advance for any info!

[Dragoneer]

woodcutter is in a prison wagon on the 2nd map i think, the hobo is in a prison wagon on map 3, the others i think you get by just finishing campaigns

[ajfusch]

You get pathfinder and farmer by finishing the first campaign, friar by finishing the second campaign. And that's as far as I've come.

[Gilmoy]

Generally, milk the Chaos clock, use +1 or +2 Find Distance (esp. Crude Torch + 1 other),
and bend your walking paths to gain sight over every hex.
Then you'll find every hidden Lost Prison Cart, in the process of finding everything else.

Specifically, in my Chapter II run, the Lost Prison Cart is near the 1st town (Sanctuary Moon).
But here's the key point.

+ Envision the 3 quest towns to be a big triangle.
+ The Lost Prison Cart is outside that triangle.

Brilliantly devious, no? If you blindly click on the quest steps to show their positions,
and beeline directly from each village to the next, you'll miss the Cart for sure.
It's off those paths.

The way I did it was (ahem) I brain-froze, and utterly forgot that I could click a quest step.
"Surely", I thought, "if this tiny area is the only Foothills on the map, then they must be
over there in the unrevealed hexes". And so I went there, and --

- I was utterly wrong. The towns aren't there, only mountains and sea.
- I was wrong. Foothills is not contiguous, it's 3 (or more) disjoint regions, widely separated.
- I was right. Oh by the way, I stumble/blunder directly into a Lost Prison Cart.

Woodcutter, that was easy. Where are those darn quest towns?
OH DUH I CAN CLICK ON THE QUEST STEP --

~~~~

So "all" you need to do is to go in the completely wrong direction, at least once.
Ergo, thousands of players have beelined in the right directions only, and missed it.
(Somewhere, two devs have high-fived each other thousands of times, once each )