From: Sandy Reel
Time: 10:43:34 AM
I've done both several times, but always in cold weather so bugs weren't much of a factor unless you go to visit the village.
PI is less crowded. That's a plus. Fishing is about the same. Cabins are much nicer and have electricity, if you are into that.
South Core has more beach variety and interests(point, south beach, two inlets, lighthouse, etc). Lot's more crowd and probably more rangers.
I prefer south core but sometimes it's hard to put my finger on why. They are obviously very similar, but also very different.