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I was wondering how you'd get those re'vacced from a hotel room. But, I do hBe some hiking compression bags with a valve - you just kneel of them and the air gets pushed out and doesn't come back in.

I would assume you can borrow a vacuum from the hotel.

There's some hiking sleeping-pad inflation devices that can also deflate vacuum bags. I don't use those pumps for sleeping mats because they're extra weight for something I can do myself easily enough. Though, if you have one, maybe the extra weight is worth it. I've also seen people use hair dryers to vacuum seal bags, but not sure how much compression they could achieve.

Those could work too. I'm not too keen on the deflation device since we are trying to keep things lightweight and save space.