Call me crazy, but I liked the feel and the whole atmosphere of IWD and HOW better than Baldur's Gate. I guess I just like the great outdoors

Its a really good game. I've just completed it again and Im restarting to get my characters on a high enough level to actually go through Heart of Winter with relative ease..Imagine a party around 11-14 levels and having trouble with 6 barbarians and a bunch of barrel wights.
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Why?