We went to Disney a few years ago the first week of Feb and it wasn't crowded at all. Wait times were 5-10 min. It's generally a non-school vacation time so it won't be horrible. You will have a blast. Make use of the magic hours if you are staying on Dis property, especially the evening ones. We were able to take the kids back to the hotel for lunch, pool, and a nap then venture back out for night time. The weather that year was a little chilly but then warmed up slightly as the vacation progressed. However, it was better than back home in MA!