Local Fish/Food in Ipperwash?
I'm not sure if there is a place that sells local fish in/near Ipperwash / Lambton Shores / Forest.
Purdy's has a location in Grand Bend, as well as the locations in Sarnia and Point Edward. http://www.purdyfisheries.com/locations.html
I dine at F.I.N.E. in Grand Bend around once a year, and usually order the pickerel. http://www.finearestaurant.com/
There is also a place to buy fish and smoked fish at the Bayfield marina. http://www.harbourlightsmarina.on.ca/services.htm
Out of the Blue is on Hwy 21 near Bayfield https://www.facebook.com/OutOfTheBlueFishAndSefoodMarket
Check out this map for local foods in Lambton County http://www.locallylambton.com/html/map.htm.
Farmers' Markets in Lambton County http://www.locallylambton.com/html/farmers_markets.htm
Here is last year's Lambton County, from Sarnia to the Pinery thread: http://chowhound.chow.com/topics/857417
Fresh fish from Purdy's, under the Bluewater Bridge is the gold standard. They have boats in Lake Huron every day.
There should be local corn, tomatoes, cucumbers, firewood etc at roadside stands, sometimes on the honor system! Also farmgate eggs and chicken if you look or ask. My source for free range eggs and chicken is Esther at 1516 Napperton Drive, Kerwood.
Sobey's in Grand Bend is not bad for groceries.
Agree on Purdy's, but it's about an hour from Ipperwash to Sarnia. As Pakmode said there's not much up there. If you find yourself visiting Forest there's a decent little sandwhich/salad/bakery spot for lunch called The Wicked Pickle on King Street: