Is it okay to share a hotel room with my wife and her sister if we keep separate sleeping areas?

As-salamu alaykum, folks. I need some advice on a travel situation I’m planning. I’ll be traveling with my wife and her sister to Japan, and we're trying to save money. We're thinking of booking one hotel room for the three of us, where my wife and her sister share a bed, and I sleep separately on the floor or a sofa. We'd also set up some kind of barrier or curtain between the sleeping spaces to maintain privacy. My main concerns are: Is this arrangement halal, given that there's no sharing of beds between non-mahrams, and does putting up a physical barrier make it more acceptable? We're just trying to be practical while sticking to our Islamic principles. JazakAllahu khairan for your help.