We have been several times since 2004 and never saw anything other than those cute little lizards and armadillos on the roadside until our last trip in April. While walking to the parking lot after dinner at AP, along the path at WL, we saw one slither along. At first, my mom and I didn't notice it, but then my H thought he should tell us so we could move (we are petrified by snakes). We ran back up to the driveway for him to come get us and told the CM/mgr at the valet desk. I guess he had been looking for it for a while and went to deal with it.
Another day, while sitting in our seats at Fantasmic, I saw a man carrying one that he just found on the way in (up the back path where fan. pkg people walk, ie. us a few minutes before)to show a CM. She told him to just toss it in the bushes right next to where everyone was sitting. I was watching the show in the dark, but couldn't stop looking on my right(using my cell light on the ground) most of the time making sure he wasn't coming back. Uggh!