The ideas listed so far are good ones. Your idea about going to Downtown Disney on the first night is a good one too, and something we have done before.
You haven't mentioned where you are staying, but that could open up the possiblities too. We took the boat from POFQ to DD once and that was nice. There is plenty to keep you busy at AKL without leaving.
Don't forget to take advantage of the many free places you can watch Wishes from. The well know places are the beach at the Poly or from the CR tower, but I've found a better place.
We were staying at WL and had taken the resort launch to MK before closing (you don't need park admission for that) Just before Wishes started we boarded the big ferry to the TTC. Hardly anyone was on board because everyone was still in the part waiting for the fireworks. We had just started back from the TTC with even fewer people on board when Wishes started. You have a great view of everything from the top deck. The captain even slowed down so we wouldn't get to the dock too early. You can't hear the music at first, but we could hear it at the end as we neared the dock. The ferry docked right as Wishes was ending and we hopped off and were the first ones on the launch back to WL.
I hope you find something fun, free, and magical to do!