Many RV's use a 75" long queen as opposed to the standard residential 80" long to make their floorplan work. So, if your tall, your toes could be dangling. Some people buy longer mattresses and sacrifice clearance to make it work. Others slide the mattress down a bit and put extra pillows in the gap up front while camping to make it work. I was lucky. My floorplan came with a full 80" one. Not a deal breaker and if that's the only thing I had to adjust, I wouldn't sweat it personally.