Stick with the Woolly Bugger. I've been fishing the same way and just killing them on local lakes. I look at the flies coming off the water and try to match the size and color. A small Elk Hair caddis works most of the time. I've tried a nymph below a strike indicator and without, still working on that. I fished one night last week after sunset. No trout were biting before sunset, no fish on finder. Look at the PIC of Fish finder about 10:30. And they were biting like crazy(Woolly Bugger).