OK, so the setting for the campaign will be the nation of Lastwall, part of Pathfinder's default Inner Sea world. Lastwall is bordered by the Orc nation of Belkzen to the Northwest and the fractured scheming nation of Ustalav to the Northeast. Lastwall is also responsible for guarding Gallowspire, the haunted tomb of the Lich Tar-Baphon, 'The Whispering Tyrant' who ruled the region for centuries before being defeated by an army of crusaders.
The government of Lastwall is a LG military dictatorship that takes security very seriously. The party consists of individuals believed to have great potential by Lastwall's leadership. By sending you guys on missions, it is hoped that you will evolve into an elite unit capable of taking independent action anywhere in Lastwall's sphere of influence should a crisis arise. Whether is ends up being the case is anyone's guess.
In this campaign orcs and undead will feature as prominent antagonists. Most adventuring will be in the countryside or in various caves/ruins: since the populace is very law-abiding there will be little action in urban settings. There will be various RP/diplomatic options available, so don't ignore non-combat skills.
While in Lastwall, NPCs will be wary of CG PCs and distrustful of N/CN ones. In the Inner Sea setting in general, NPCs give considerable weight to the deity you worship, especially if you openly display their holy symbol (whether you are a divine class or not). Unfortunately I do not see the deity list on that website, so if you don't have access to a Pathfinder book let me know what you are looking for and I will list the possibilities for you.