I have briefly fished both groups mid-day with lures and flies without much success; however, have talked to some who had been fishing Sunrise (upper) with good success earlier in day. Fishing evening and mornings I would expect them to be more productive with Kastmasters or flies such as mosquito, mayfly, and caddis fly imitations. I have caught brookies in May Lake and Merced. Would assume that Sunrise has similar populations. My typical first choices are adams/caddis/cahill/humpy (red) or hare's ear nymphs. If you are not a purist, take a small spinning reel and a few lures to use with a flyrod.
The cure for a fallacious argument is a better argument, not the suppression of ideas.
-- Carl Sagan