We will be traveling to Orlando the first week of May and plan to spend one day at US and one day at IoA as well as a day at Seaworld. Can anyone advise me on the best days of the week to visit those parks? Should I just avoid weekends? Also, the express passes at that time are about $20. If that means low attendance (which I hope!) would I really need express passes in May? Thanks for any input you can give me!