last year when we where there in July, there was a teachers convention on, i would not say they took over the place probably the opposite, as they got breakfast at 7:30 then on to there convention till late in the afternoon, Like Fan2CSkr says they are away most of the day and most stayed around the pool when their convention was over.
This being our first time. i dont know if it affected FOTL, but the longest we waited was about 15mins for Poseidons Fury , and this was because when we went into it a show had just started, we where first in line in the express pass, most other rides where anything from 5 to 10 mins at the most, so i do not think it made any difference