I don't think the first two days need to be a package. I think you can get the discount on the room only, but you'd have to forgo the fancy magicbands because that's part of the package with tickets (I think). There is a possibility that you may have to switch rooms, but they can link the two reservations together, which I believe gives you a better chance of staying in the same room, but you would still need to check in at the front desk on the 26th for your second reservation. I'm not sure if that becomes more of a hassle for you then it's worth. If you did go that route, I don't think your
ticket prices would change since you're not making a change to your tickets. Again, I could be wrong.
Good luck!