I've taped from this position several times this year - a few pieces of advice.
-They will tell you that you can't tape at the door. Either bring it in as minimally as you can, or be prepared to keep working through people until they find someone who knows whats going on and allows it.
-They're very strict about gear on the ledge - I gave up trying to clamp. Using a gorillapod gaff-taped to the balcony side of the ledge worked, as did a really minimalist DPA rig with the mics just taped down, separated as much as possible. There's kind of a mini-ledge that will be towards you that you can use to set your deck on, lightly taped down if you need.
This was for TTB & Phil/Bobby - so as open as you can get in terms of taping, but I still had difficulties (for TTB, at least). I'd just try to keep it as inconspicuous as possible...
Good luck!