You should be good to go. I've been told that you are not allowed to check your bags with RAC (remote airline checkin) more than 12 hrs before flight departure...that would have you checking your bags at 10am. If you want to try to check them earlier than that, you can head down to the RAC counter and ask them that morning. I like to check my bags, get my boarding passes issued and then head off to the parks for the day. Just be sure you are back at the resort no less than 3.5 hrs before flight departure. I assume you are using DME, so you will have a pickup time of around 6:45-7:15. Be back at the resort by 6:15 to get any carryon bags and head to the DME bus stop 15 mins before your pickup time.