Glad you liked it. I have a bit more to do, mainly in the way of statting NPCs, but I'm having fun with it.
As far as Wizards and Clerics traveling though, there are usually plenty of reasons. The Cloistered Cleric varient lends itself more towards the "staying in the temple all day" mindset, but the standard Cleric class is a combat monster that's meant for battle. Wizards might adventure to find scrolls of ancient lore and power and other magical shinies. That's why a lot of people adventure, really. They want to get rich by killing things and taking their stuff.