We are going to spend 1 day at Disneyland. We have never done the Jedi training academy before and I think my son would really enjoy it. I noticed on the website sign up is first come, first serve. We are driving up from San Diego that morning so may not arrive at park opening. How easy is it to get a sign up? Do you have to be there right when the park opens? I don't want to tell my son about it and then have him be super bummed if he can't do it. This will be a Wednesday in February so not a crazy busy time but there are only 6 training academies that day. Thanks!