Hi jcwarn
Blea Tarn above watendlath is one of my favourite tarns, and as far as tarns go, it holds some really good trout, i reckon up to 3lbs..!! Last year i managed a fish of just over 1lb. Its a bit of a mission to get to but well worth it. All your research will tell you to fish mainly dries but be sure to kit yourself out with some nymphs, as on my first trip up i took mainly dries but observed a big variety of damsel, mayfliy, buzzer and other fly life, and on a day when the rises were non existent i was wishing i had some nymphs. If you want to target some of the bigger browns i would throw in a lure or two, there are plenty of dark minnows, so something in brown or black.
I make a trip up once a year, this year its in july and you can be sure that blea is on my list.
Watendlath is also a super place. When i fished it in august last year they were going mad on corixa and shield beetles..!! Fishing was tough as they were taking nothing else. i Managed one by chance, ate him for dinner and took out a large handful of them from his gut, needless to say i knew what fly to use the following day and had a ball. Other tarns in the area are few and far between, there is harrop tarn and dock tarn, both containing little trout, about an hours walk from blea, havent fished them though.
If you've had a look on google, you may have found some videos i posted on youtube a while ago. Quite long and a bit boring but some good info.
Let us know how it goes.
Cheers
D