Simpson has a nice spot down at the outlet end of the lake. Make sure that you take the short walk through those massive Douglas firs, very impressive.

I have not used a depth finder, so I can't tell you the actual deptfh of the fish. I have had good luck with the pop gear and a 1 ounce sinker. I tend to fish for the kokes up the lake from Simpson in the deeper water out from Little Hoquiam. That is the large bay on the right as you head up the lake. Since you will be at Simpson, they do hit bass along the pads at that end of the lake. Be prepared for how busy the lake can be, especially down by Simpson, if the weather is nice.

There are also some rather large cutts in the lake. They don't tend to hit the koke rigs, perhaps a trolled rapala or other spoon.

Good luck and have a great time.