"Worth" is so different for different people its so hard to say. For my family it wouldnt be worth it. We would rather stay longer, eat better, and buy more souviners then spend money on a larger room. We spend very little time in our room when we are in DL. If we are in the room we are sleeping or showering!
About 15 years ago dh and I got an employee rate on a suite at the DLH. It was very nice. The room was huge. We had more space then we could possibly use!