The US All Star Federation World Championships are the event being held April 22-26 at Disney. As mentioned earlier, this event is inviation only. The top teams from the US and around the world will be in Orlando to compete for the world championship. These are teams from cheerleading/dance all-star gyms. They don't have affiliations with any schools. So it's not like the schools can give them permission to miss classes.
Here is a link to the two travel packages (for teams and for families and friends). You should be able to find out their hotel options in the packages (I didn't open them myself, but I've received the similar packages from Varsity for other events).
http://usasf.net/worlds/travel/
As people have stated in the past, the hotels listed in these packages are likely the ones the teams and families will stay at. But any of them have the option to buy tickets to the event only and stay wherever they'd like.
For those curious about cheer and dance events in general, it was mentioned earlier that there is a event listing at the WWoS web page. If any of the events are labelled UCA, UDA or Varsity, that means they're sponsored by Varisty Brands, Inc., the largest provider of cheer and dance camps and competitions. Their website is:
www.varsity.com You should be able to find similar travel packages at the web site for any events they sponsor in Jan through March.
Note that some of the cheer/dance events at WWoS/Disney are not sponsored by Varsity. But I would think if you went to the sponsoring companies website, you might be able to find their travel info too.
Have fun.