We went in begining of January and never waited more then 5-15 minutes for a ride. We would get a fastpass when we could which would be for about 30-60 minutes, then jump in a shorter line and by the time we were done our fastpass would be vaild.
The time you're going is probably one of the slowest times of the year. That's why we go then. It can be a little cool but not as bad as it is back home. Enjoy, maybe we'll see each other there.