The container you seek is a small cylindrical affair repurposed from its original role as matchstick holder to happy campers everywhere.
This little gem is under cover and away from prying eyes. Those who seek will come to discover GZ is well off the beaten path for the general location. However, a bit of caution is advised. Muggle eyes WILL be upon all who enter. Moreover, muggle eyes WILL be upon all when they depart. Stealthful approach is imperative. It's advised that large groups splinter in to single units or two-to-three person guerrilla sized cells.
Stealth is imperative. Therefore, CO advises that the GZ is not for children nor young teens. To fit the stealth narrative it's best to look 21yo or more.
Stealth is imperative. Therefore, CO advises seekers to review their map to devise a creative approach and departure that's fun and fast.
GZ access requires capability to traverse stairs.
BYOP