as far as weight goes, I use a 3 or 4 ounce sinker to get the weeds down as they take a little while to get down when you hit the deep stuff. As far as a float , I use a large northern bobber -3 inch wide stuff to keep the line vertical. I would also take 40 feet only if you are fishing that deep at any time of the year . if you never go that deep less is fine. better safe than sorry though cause if you do and dont have it, your screwed.
FF