Fished Loch Vale, RMNP 9/2 from about 8am to 2pm with some intermittent weather conditions. Fish could be seen all day cruising but actual takes/strikes where generally light. Only saw 3 other fisherman and fisherwoman. But they didn't fish very long.
Ant patterns did produce the most fish for me. Although I took several on spinning gear as well. Due to the lake size and shape, I would recommend fly and bubble if you are not a proficient fly caster (and maybe even if you are). Rises were very consistent in the middle, guessing of course, is a 50 yard cast.
Normal amount of hiker traffic and tourist interactions. If you go, at this time Bear Lake Road is under a special permit system. I did get a permit ($2 online & printed) for the 5-7am slot and was able to park at the trailhead I wanted.