I used to camp at the camp colliford tavern camp site (you drive past the entrance on the left after you've come off the A30) and I always got my tickets there usually the night before as I like an early start, though if I remember rightly you can get a ticket after 8am. Telephone number I believe is 01208 821335, email
info@colliford.com, as I don't know if they still do fishing tickets.
Yeah, I fish the sedge pupa similar to a buzzer method with a little twitch every now and then, it sits just under the water surface. Not sure if this is how it should be used but it works for me. I have two variations, one which will sink slowly and fish the top 12inches or so and the other which has a little cdc fluff all on a size 14 or 16. Daddys/hoppers are another good fly to use on the water there.
Have fun - always enjoyed it there