League of Surveyors: A collection of adventurers, guides, caravan leaders, and treasure hunters.  The upside to joining is that you can get maps of the wilderness and hear about areas discovered yet not explored.  The downside is that you're required to share your own maps.

The Like Minded: Thieves Guild in Ket. The upside to joining is that you would have a safe place to store goods back in civilization and wouldn't have to worry about the alchemist disappearing with your stuff.  The Guild doesn't steal from its own.  The downside is that you have to sell your loot to the Guild, and they take their cut.