Ironchefsakai I have same size turtle as yours (7 inches= 17 cm?) I think,and this is what I would do if I were you. Maybe it is not best advise so don't be so harsh on me.
I would take some other container with me where my RES can swim and eat, and sleep, some towels, let's say 6 pieces or more never enough. It would be good if that hotel room has a bath. Then your turtle can have her food there and also maybe little bit swimming also and you dont have to use that container as a swimming/eating place. But if there are not bath then please, before you put your turtle in there for sleep, dry it off properly. Also little extra exersise in hotel room floor is good let her walk and explore
And in the next morning same thing...swimming (least 30 minutes), eating etc.
But again, this is what I would do...