How to travel costless from Belgium to Barcelona?

Hello,

We are 3 friends who would like to travel during summertime to the Benicassim-festival near to Barcelona. We bought our tickets already, but we don't have must budget left. Does anybody know how to get there very very cheap?

All ideas welcome!

Does any person know somebody who is going to travel by car to Spain and can take 3 persons with around 14 july and returned around 20 july?

Thanks a lot!

A.

We are all 3 living in Belgium! So departure: Belgium or Holland

Fibo festival ? A must do!

Some of the bus lines are very cheap...very very cheap and very uncomfortable...