This really isn't too big of a deal and there are a couple ways to handle it. Quick question, are your Dad and your reservations linked? If so, then he may have all of the tags for your group. Check that out to be sure. That happened to me earlier this month but I didn't realize it until standing in the ME line with my friend.
If you don't have your tags go ahead and check your luggage as normal. Keep your luggage stubs handy because depending on what you decide to do you may need them.
When you get to MCO you'll have two choices.
1. Go get your luggage from te corral yourself and carry then go to ME to check in. (This can be a hassel or a easy depending on which terminal you arrive. We were fortunate enough to be in the same terminal as ME so I had my friend grab the luggage and bring it down while I went through the ME line. ) Once you check-in at ME you'll go to your assigned bus and check the luggage there. When you get off the bus you check in the hotel and if your room is ready take it there. If it's not you can check it and then have them deliver it later.
2. If you don't want to go through the trouble of picking up the luggage you can go directly to ME and when you check in tell them you didn't get your tags. They'll ask for your luggage stubs, name, flight info., etc. and will retrieve your luggage for you and bring it to your room per the normal ME process. (Now, I've personally never done this but have know people who have and said it didn't take any longer than usual.)
So depeding on your level of faith, time of flight, etc. hopefully you'll have enough info. to make a decision.
Enjoy your trip.