Planar Guide

Certain people have a knack for finding the cracks and chinks between planar borders. They know the portals, the vortices, the trade routes, and the other means for traveling the planes that don't involve spells or other magic. Finding a guide is the hard part; after that, a guide worth her salt can lead a party to a plane she claims as her specialty in 2d6 days, or refer the PCs to another guide if the plane they seek falls outside her knowledge. Most guides claim a specialty in the connections between only three to four planes.