Don't show up early they kick you out!
We called ahead and made sure that everything was ok with our reservation and confirmed that we could check in early and when we got there they said "Oh we don't have any rooms so you are going to have to go to another hotel we booked for you 10 more miles from your destination Sea World." So we went and they not only wouldn't check us in early they rudely told us that they didn't have any rooms and they weren't going to check us in for 2 hours. We went back in 2 hours and they told us we had to wait another 30 min in order to get a room. They gave us a room that did not accomidate my family and small children so we had to move rooms, all the while their corporate offices told me that they couldn't do anyting because we were getting the first night for free so they didn't know why we were complaining. I would steer very clear of the IHC...Holiday Inn chain...they are not only rude, their corporate customer care people could care less about any situation you may see yourself in.