play it safe but don´t worry. In denmark we only have one agency that covers Ibiza with package-deals for all of Scandinavia, meaning that around 17 million people are served by the same agency!
This year is overbooked and I know cause every year I arrange trips to Ibiza for Danish DJ´s, record-companies and so on.....we booked in December and August is sold out by now! Has been for a month so that´s wicked!
If there are many possibilities from where you come from, then chill and tkae one day at the time, but still: better be safe than sorry, right?