I switched from braid to 50lb mono for all my shallow water trolling, I will never go back. 

However, for you braid guys who use the same type of line for casting...

I would spool the entire wide spool trolling reel (just over 500'), then when it was time to change out (about 300'), I would reverse the 300' of used trolling line onto one of my empty casting reels, then reverse onto a different casting reel that had a 1/4 spool of backing, that 1/4 spool would get reversed again onto a 1/2 spool of backing (to about a min of 150'), after that it was time to pitch it with almost none wasted. 

Reversing line on reels is nothing new, but if you use the same line for both casting and trolling you can save a lot of $ on line this way if you have enough reels. Plus have the comfort of a full spool of new line without knots when you get snagged with a 1/2 dozen lines out.  I always put the full spooled reels on my outside board rods with either line.