I would say to have a blank map which only gets partially filled in. Specifically with only major landmark areas. Which will be few I suspect. This way you still have the exploration aspect but you also have some sort of idea as to where things are. So for example, there is a shack with an impotant character, or something, somewhere. That is the type of thing that would be marked. But if you have some sort of special area (an area where particular enemies spawn?) of sorme sort, that wil remain unmarked. This way you know the area is soemwhere in the vecinity of the shack. But you still need to go find the exact location. P.S- no idea if its feasable.