There are 2 really good lake options for Wading and Tubing/Pontooning: Haystack and South Twin. Both are fishing well and worth the time.
Same flies at South Twin, adding Damsel Nymphs to the mix is a really good idea.
At South Twin, the fish are being caught under an indicator and on a sinking line. Carry an intermediate and a type 3 for sure. My friend Tim was using a Type 5 and getting fish on the hang at the end of his retrieve.
Look for fish around the edges and on the drop off. 2 years ago, I remember a day when the fish were deep this time of year and a balanced leech at about 18 feet in the deeper parts of the lake was excellent. Boats with fish finders have an advantage to look for that.