I just want to add shortly something about Permissions, because the rest @GamerSeuss already said well.
We figured, at the moment the only way to make a guild only storage is to use the personal plots for that.
The Permissions are actually a bit bugged, because at the moment exactly the "guild" permission doesn't work for your personal plot stuff.
But you can invite all people to your plot, means adding people as a friend to your plot, because the Permission for "friends" works well.
What also works is to invite all people to a party and just set the chests to "party" permission, no need for inviting to the plot.
That will surely get fixed in future tests.
