Early season I have tried the bank just below the lodge. Seems to be a popular area early seasons. Most were fishing fishing boobies on heavy sinkers. Fish were being caught very close in. Helpful if youre not a great caster (like myself unfortunately)
Other methods are usually sink tip lines with stick flies of various colours.
When you get there ask in the lodge what the fish are taking, what area and what method. Bewl staff are always fantastic, extremely helpful etc.
I had my best ever session on Bewl a few seasons back fishing orange hoppers.... what a fantastic day and very exciting taking fish off the top. I didnt touch a stockie all day.
In my opinion Bewl hasnt been at its best since various activists released all the stock fish from the stocking cages.

However,is still my favourite venue.
Good luck & very best wishes mate.