Animation Studio

We’ve been to Disneyland/DCA a few times and totally missed the Animation Studio drawing classes. I’m determined to do at least one this time around. We have a 5 and 7 year old with us too. My 7 year old loves drawing and is into Cars. Do they usually do at least one Lightning drawing a day? How early should we arrive before one we want to do? Do you have any other tips for us to have a good first time experience? Thank you!