Are the gates open before the park is? This year, we purchased tix on LMD.com, and so we have to go to the ticket booth whnen we get there. I don't want us to run late to Minnie and friends breakfast because I'm in line.
I found this thread from this site. There are a number of opinions on the subject. So I suggest calling Guest Services to ask them directly. The park hours are subject to change, and it is very possible that whatever time before hand that the ticket booths open, may differ as well. So please do call in order to find out for certain.