In article , riverman
writes
I'd suggest tying on something bucket-like, and securing it with a 6-10 foot
rope. You ought to be able to cast over that, and with your tip up a running
fish wouldn't be able to get the fly line around it.

See my other posting. The drogue I use is like a parachute - a piece of
material about 4 ft square with lines attached to each corner, then
brought together. The whole then attached to the boat by a length of
line about 10 ft long.

The principle is the same as your suggestion.
--
Bill Grey
http://www.billboy.co.uk