This cache is on private property in a residential neighborhood, but stick to the roadside and keep your eyes open, and you won't be able to miss it. No trespassing necessary.
It is accessible from the road, DO NOT WANDER THROUGH NEIGHBOR'S YARDS.
You'll need a combination to open the lock. If you can subtract the Ultimate Answer to Life, The Universe, and Everything from the year of Big Brother, you'll gain entry. Good luck!
Congrats to Mr.Hootles2471, agentbigd, slidegirl, and Fuller.House for being the First To Find! It had barely been listed for an hour when they came across it. Great job!