Hey I will be staying onsite at Disney and am planning on using the mears shuttle to Seaworld/IOA/Universal for May 28-30th. I read to just call the day b4, but with the holiday weekend should i call earlier (or can I even do this?) Can i make the reservations for all 3 days at the same time and can i choose the time to be picked up or is it just the time they give? thanks for the help! 
