I actually fish duncarin on a regular basis. I have a lot of family in Gull Lake which is right near there. I've had some really good fishing there over the years. The best access and fishing, in my opinion, is in the southwest portion of the lake. Theres a tiny little series of docks here that you can access by taking side roads off the highway from Gull Lake going towards Shaunavon. The final leg goes down between a couple fields. It'd be almost impossible to find if you don't know the area. But theres some really nice points there with good drop offs. I've usually had really good success around there summer and winter, although I'll mention it was a slow summer there this year.