4th bag. I think this is the one that will survive. sturdy. room for 30+ discs, no need to cram.
yes, it gets heavy to carry, if fully loaded (36 discs). so I will eventually purchase a cart that fits it, for carrying anything over 30 discs.
it is about 7 miles to our nearest course, and I bike. this pack is reasonably comfortable. i could have used a chest strap for long carry days.
overall, I am excited to have such a quality piece of equipment. and there are extra pockets. and the waterbottle holders are a good fit for my 40oz bottle. of course, remember that water weighs a bit, and extra discs carrying means extra weight. always be aware of how much you carry.