We did BOTH Gatorland and an airboat tour on Boxing Day 2012. I have tons of pictures and lots of information about both experiences in my trip report here:
http://www.disboards.com/showthread.php?t=3041415&page=4
Gatorland begins at the last post on page 4 (we visited there in the morning), then Wild Willy's Airboats in St. Cloud follow thereafter. They were a nice compliment to each other, and a nice respite from the massive holiday crowds that were elsewhere in the Orlando area.
Wild Willy's staff gave us excellent directions that got us there with no tolls
. The drive was very easy. At Wild Willy's, the boats only hold a max of 7, so they said that if you have four or more in your family, you would most likely get a private tour. Our family of 3 shared with another family of 3. Staff were fabulous, giving us postcards, snail shells, and fresh picked oranges from their tree as we departed. They have two 2-year-old gators inside the little store that you can hold and take photos of after your tour.
Both are very different attractions, and very worthy in their own right. We snagged an excellent deal on Livingsocial for the airboat tickets, paying only $55 for our family for a one-hour tour (regular price was $110 for three people). Lots of great deals to be found for Gatorland as well, including a buy one admission, get one free in the Entertainment Book.
Let me know if you have any specific questions, and I will do my best to answer them
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