I dive a long hose myself, and I'm afraid I have to respectfully disagree with you.Firefyter:That's just it...can you give him the full picture? Have you tried it both ways? I have, and can assure you that it's simpler going with a bungeed backup.
1) It's a change. That requires learning something new, however trivial.
2) A better way to secure an existing octo setup is what was asked. A snorkel keeper is indeed the simplest, easiest and least expensive solution. It is certainly easy once you're there, but getting there is more complex. Not terribly so, but certainly moreso than looping a snorkel keeper.
Going to a long hose system requires buying new hoses, buying bungee, and having someone show you how to work with the new system. It may also require a different octo if you have a cheap one, like the AquaLung ABS (which works great as a traditional octo, but I sure wouldn't want to use it in a bungied configuration). It then requires installation of said new hoses (and possibly the new secondary reg). And the proper knots or zip tie config of the bungee.
A long hose config, for a DIR diver or not, is a GREAT setup, and the one I prefer to use. But it is NOT the "simplest" answer to the OP's question, as you claim.
Whether or not it is the BEST answer to his question of what is BEST, is a whole different issue. ;-)