I think you need to specify which Wailers you're talking about.One of them used to open for Bob Marley but i dont think they're active anymore.Another one,as Tom said,is the Reggae band.Then you have another Wailers,who were a garage band around 50 years ago and they had no link to the other two wailers.
I dont think any of these 3 bands are still together btw.So which ever band is coming to your school is probably doing a reunion.Either that or your College Managment is too embarrased to announce that Boyzone are visiting your college