Well, first time on these boards...I'm 14, so you don't have to take this advice but I have grown up hunting bear with hounds, and my dad guides so here it goes:
If your looking for a good place to hunt in Maine, you really want to hutn the North, in a nice secluded area, for a trophy bear, however you most likely already know a trophy can pop out any moment...
I recommend checking around the Portage area, and as Graybeard has said possibly give Fish River Lodge a try...That's a nice area in land that sees a lot of summer tourism and fall hunting...But it is prime bear/moose/dear/grouse country...