I just got back from my Universal trip, and we used one. I ordered mine online. It was called Intex. It is a raised (kind of) twin bed with a plug-in inflater and deflater. It has a flocked top. It was around 40$. When they say raised it is NOT as high as a regular bed, but is I think 19 inches high. For hotels at Universal if you are staying at RPR or HRH and not in a deluxe room , you need to just get a twin, anything bigger wouldnt fit. If you are in a deluxe room or are staying at PBH a bigger one might work. Have a great trip! BTW, housekeeping brought linens and made up the bed for us every day, which was very nice.