I'm wondering this as well, we are going from May 4-8 and staying at Royal Pacific, so we'll have FOTL access.. I hope the crowds aren't too bad!
i have been to universal during this time period some years back and did not think it was crowded.
you'll have fotl, you'll be good to go.
if you would encounter any crowds, have lunch and dinner at the off times.
don't think there will be crowds during your time though.