Re: Penobscot Mid May
Mid-May is a little early on the WB. It's usually early June before it warms up and the fishing picks up. I wouldn't count on missing the black flies that early either, and since I'm being negative....the golden road follows most of the WB, so there isn't as much hiking as you would think to get away from the crowds.
All that being said, the crowds aren't usually that bad. It's still a beautiful location and river even when the fishing is slow. If you haven't' been there before, it's big and fast so be cautious. I would recommend a wading staff. Your rods should be fine. I usually used a 5wt whenever I went. Fish early before the inflatable hatch starts, then later when they are gone.
I haven't been since I moved to AK, but always enjoyed the river when I lived in Maine.