I had no idea they ever did this - is there Toy Story related stuff going on on the pier regularly? We're going in a very off season time but wow! DS would flip!!
When I was there in December, they seemed to have a little show, where the jeep was stopped, before the pier and then we saw them driving on the pier A LOT!!!!
We were there last week, 10-15, and everytime we were in line for Toy Story Mania we saw them. It was different days, and different times of the day so they must come by pretty often. It was very exciting seeing them!