This is a little farther away, but I'f I had a week for some guided fly fishing, I'd head to up to fish the upper Delaware. It's around a 5 hour drive from DC. They guide for trout in drift boats, which is unique to the east coast. You'll be in the peak of the hatches/dry fly season. The fishing can be technical; however a week with a guide and you'll definatley learn alot, and get shots at nice fish. Your 5 weight floating line will work perfect!