When a party explores a hex with a hidden encounter or location the module calls for a perception check to notice it. Does every PC get a perception check, or only the PC with the best perception? If everyone gets a perception check, do familiars and animal companions get one as well? Or cohorts or hirelings?
Also, when exploring or traveling through a forest, swamp or mountain hex while mounted, does the party still get the benefit of having a speed of 50 or is it impacted in any way? Do PCs ever have to dismount to travel through any kind of terrain hex?