As I reported last year, there are large trout now spawning in RSL. So give it some time as some of these fry will grow and "not be planted". Best time to fish RSL is late June, July, and August when the lake is drawn down and the stumps are exposed.
I fished Rattlesnake last Thursday. Interesting conditions with very low water. I landed 5 all a on a non beaded, sparkly Olive Bugger. I also used a Rio Deep Six full sink line. All Rainbows around 12". Even with extremely low water levels the depth is at 43' and the surface temp was at 57-58 degrees. Not the most exciting fishing but it was certainly a beautiful day and RSL is a convenient outing and a great opportunity to do some fishing close to home.