Victim said:Escape is very difficult, in most cases, as mentioned above.
Enemies that you bypass now will often need to be fought later. If the group kills the wolves first, it's easier for them to retreat if needed. Locking yourself in with an unknown danger is smart how? If the group can't deal with the stuff inside, then they're screwed because the wolves will block their retreat.
Also, given that tougher monsters are usually in the deeper areas, a group that can't hack the periphery guarding monsters should serious consider leaving the area.
I partly deal with that by having the PCs need to worry about what happens if they have the fight with the wolves. If they *do* fight them, they might beat them. But now the place is covered with the scent of blood, which in turn might attract something even bigger which might be in the neighbourhood when they have to go back through there during the retreat. It would suck to be leaving the castle, carrying one or two bodies of companions, most of their spells used up etc., walk through the bodies of wolves from the beginning of the adventure, and run into a family of wyverns busy feasting on the meal the PCs left them right at the beginning.....
Banshee