I've been to Duckworths in Orillia several times. I've always enjoyed my meal there. Good sized portions, not overly greasy. I've only had their fish and chips, and only been for lunch.
Duckworth's Fish and Chips
750 Atherley Road, Orillia, ON, L3V 1P6
There's also Bounty Fish and Chips on Colborne St downtown. I've only been once, don't think I'll be back. Food wasn't bad, but I find Duckworths better (and they aren't licensed).
Hope that helps
Westside Fish and Chips in Huntsville. 126 Main W, (705) 789-7200.
Reviews range for AMAZING to horrible, but we've always found the beer battered halibut to be very good. Not the best fries, however. They're the frozen kind, which is kind of weird in a place with the words fish and chips in the name.
Also, the homemade pies are excellent. Best coconut cream pie I've even had. Just one notch down from the pasta bar if you can believe it. Sometimes we go in just for a slice of pie.