You can ask for a cot. (like a small single army cot) we got this when we traveled with my parents and they had the sofa bed and DS found it cozy. I bring our own night light, lovey etc...
LOL still woke at 6 though due to wanting to go swimming, play games, watch tv, use the kitchen and also due to the noise and light coming in. So it could happen.
ps. we were never charged for the cot either, I just called housekeeping to bring it.