I also travel a lot for work, both domestically and internationally.
Most of the large hotel chains (even Westin with their "Heavenly Bed" promotion), do not change sheets every day. They often leave some sort of written indicator that you can leave on the bed requesting the change if you so desire. Most have gone to a 3 or 4 day routine change.
Personally, I think this is acceptible and environmentally sound practice. I do not change my sheets everyday at home.
And even though I like, and expect, to be pampered on vacation, I care about the environment that I am fostering for my grandchildren.
So to OP, if you strip the bed and ball up the sheets, your beds will most certainly be made up with clean sheets. But just because your mother did that in a less environmentally aware time, does not seem to me to be a great practice.
JMHO