I remember lugging dumbbells on vacations a few years back. In Ubud, we did whole classes with just our own weight and focus. Back in my place, I ditched the complex gear. Now I roll out a mat and follow the same simple sequences, feeling just as strong.
Actually, hotel towels always seem too thin or slippery to give real resistance. Bands pack down flat and you know they'll work every time. Just my two cents.