We are staying at CSR the first week of April so it's during peak season when we check in. We have a preferred room and asked for a room in 9B or 9A. We heard that online check in makes it harder for them at arrival to fulfill the request for some reason and causes a bigger headache. We plan on arriving around 8:30am and checking in to get our passes but no need to go to our room until after a day at the park. Is it better to wait and do the full check in at arrival especially during peak season in order for them to satisfy our building request or can we check in online and not worry about them satisfying our building request?