Mara Lake B.C. Advice Needed

[Chief]

We are headed to Mara on Thursday and I haven't fished it since I was a kid. We used to just troll Flatfish or Willow Leafs for Kokanee and Rainbows. I understand there are Lakers in there as well, do I have any chance to catch them without a downrigger or will they still be too deep? I'm thinking I will have to be fairly deep to catch a 'bow of any size as well. I'm really excited to fish there again because my 8 year old son has not caught anything other than pike and walleye. Any other lures or tips would be a big help.