2 weeks ago I called down to Silver Lake Resort. Temp at that time was low 40's, on March 3rd it was reported that the water temp was 42-45. You are correct the lake is very shallow the deepest spots only reaching 10'. I see you are nearby me, if you want to change your plans and head down on Saturday let me know and we can caravan on down there. With a couple of boats there maybe we can exchange some info on the water and figure it out. This will be my first time down there this year.