I like to tow my kayak also as it pulls easily. You have the comfort of knowing it's there, and you also don't have to retrace your path.
I used a plastic 8-1/2" x 2-3/4" spool I found in a fishing supply store, drilled the holes around the perimeter out larger to accommodate a double ended snap, (like an over sized finger spool). It holds about 100ft. of 3/16" nylon line.
I attach the line to the kayak, run out the line and with the snap fastened on the edge of the reel, take a twist around the snap and through the snap so it doesn't unwind.
Then I just slip my arm through the reel to my bicep. It's easy to let out more line, and it's near enough neutral in water that if for some reason you were to let go briefly, it won't get away from you. It seems less of a hassle than a flat reel like for dive floats.
I have a couple photos, and I apologize for not having figured out how to post photos. If anyone is interested, PM me with your email and I'll reply with a photo.
Dennis