Yes the postern is still there, not accessible to the public (unless they are very nimble), but we would love for it to become a public thoroughfare again in the future (though EH complianed we cleared the ditch of trees as it made it dangerous???????)
Do you mean plans as in ambitions, or plans as in maps? If the latter here is one - interestingly we now think that the 64 steps aren't called so becase of the number of steps (though I have never counted!) but actually as they are next to WD boundary stone 64