I used my cordless drill and had a friend hold the spool of line. Got it nice and tight. After the first time of using them, I tried to wrap them back up, no way. Ended up taking about 1/2 the line off the spool so it would fit when wet/frozen.
So, get it nice and tight if you want to, but it will never stay that way.
I'm using 40lb dacron btw. Easier on my hands when fighting big lakers.