If you ever want to know how much cable will fit on a drum, this will tell you.
http://www.ingersollrandproducts.com/lifting/winches/drum.htmI did it for the old Braden I'm going to put on the rear of my truck. I plan on putting 150' on it, so that will be about 4 raps. Since it will hold 9 raps, it shouldn't ever get bound up. Normally I wouldn't want to have a winch I can't get to, to monitor the cable. But, in this situation it shouldn't be a problem.