We took a Wishes fireworks cruise in December. It left from the Contemporary marina. It was extremely cold that night. We were bundled up and when we got into the boat, they gave everyone a warm blanket too.
It was nice. Our boat sailed to the front of the MK area. However, the boat didn't turn all the way facing front, so we had to turn sideways and look through and around the heads of the people sitting beside us. The music was piped in the boat and it was really pretty.
Just wish we had been sitting on the left side of the boat. But, who knows, perhaps the boat sat the other way the last time and people on the right got a better view?
It was neat regardless. You will love it.