If cost is not a big deal, I would recommend the pontoon boat cruise for Illuminations ($320 in 2008) for 10 people. We treated our family to that last year and my FIL loved it, everyone did but for me to have found something he was really impressed with was a bonus! The only downside with this is that there are only 3 boats and we had to book 90 days out and it was a race at 7am to get the reservation for the exact night we needed.
We ate at the Yachtsman Steakhouse (2 point TS credits) and went on the boat from the dock right there.
Good luck with your planning!