suggestions for hotel self-bondage?

I travel frequently for work, mostly to Europe and the USA, and enjoy indulging in some - or even a lot of! - self-bondage while staying at hotels. I don’t typically use the hotel where my business is located, obviously; it’s too risky. Instead, I book into another one, pay with cash, give a fake name, etc., and then settle into my session.

I need humiliation/degradation mixed in with my self-bondage, and over time I’ve experimented with various scenes, starting mild but now going much more extreme.

Now that I’ve discovered this site, I wonder if anyone can recommend some new ideas? Here is some information that might help you understand better. I must be completely naked, except for the bondage gear, and HELPLESS until someone releases me. The items I use need to be airline-friendly (so most of my heavy home equipment - slave chains/padlocks, timers, etc. - are out!), or things I can buy locally and then throw away afterwards. I have used local professional “ladies” as the means of release before. There must be an element of “risk of discovery” or “exposure” involved.

I prefer longer bondage periods over shorter ones. Extreme is better than mild. Thanks for any suggestions you can offer.