Hello there!
Unfortunately I have little to no knowledge of cameras, I am but a modeler and terrainer, sorry. If the map type you're making allows it, might I suggest that you make fixed cameras that change when the character enters a new area, if that will work well with your map...
Otherwise, go to the mapmaking help forum or even request forum, the people there are always eager to help and have much more knowledge on cameras than me.
Good luck!