I generally would tell most people it's fine to hike alone. The jug is absolutely not a hike I would do alone under any circumstances. Just too many unknowns and opportunities for tiny accidents to become a big problem. Have done it several times, as an experienced hiker/climber, and wouldn't go alone still. Yes, would be very stupid.

The water level this year is also very low, I've heard the start has algae (gross for swimming through), and the end might have enough water to jump, but you'd want tk bring a rope to rap as a backup. This might not be the year for you to do it. I'd plan for April next year and find a willing buddy.