Good move picking one with an "extensive" history.

Cash in an unsealed envelope on the bathroom counter.  This allows her to discreetly take a peek while she is freshening up. I never mark it gift or anything else.  Putting her name on it would be useless, since in the unlikely event that LE breaks down the door I guarantee the name you know her as will NOT be the one on her ID.

First couple of times I left my ID beside the envelope, but haven't since, and no one has asked to see it.  If she insists on that on her web site, well decide for yourself.  If she doesn't request it, I wouldn't bother.

especially any question and answer section.

Many gals have instructions pertaining to these matters and following these instructions to the T is very important to them.

Depending on the hotel, you might have to go downstairs, find her, and escort her up to your room. I've attached a link to the various hotel's security policies we like to use.

It's a good idea to leave open luggage and/or a boarding pass or ticket voucher openly visable in your room. It's comforting to Vegas providers to see that sort of thing.

Too much shit to think about, lol. Don't worry and just enjoy yourself.