Hmm, if it were me I would probably go with the 5 weight and try the following strategies.
First, I would start with what worked before, but maybe up the tippet and dropper strength a bit. If that doesn't produce, then I would change to a sinking line and I would probably swing a small squirrel tail hairwing streamer; a HammLim Minnow to be precise because that's my go to streamer (it's in the Fotw archives), however I would suggest you go with what you know works in your waters. By this point, I might give the water a rest as I curse and swear, then switch to a floating line and a team of 3 soft hackles. As my frustration level increases and as the froth that's developed on the water obscures the surface, I might switch to a weighted nymph under an indicator. Finally, having by now found a decent sized rock, I would spot the fish and try and just knock it one for good measure. After that, a size 32 trico dry should do the trick.
- Jeff
If that didn't work. I must have got the fish with the rock.