Jarim , costs are not as much as you may think , were bringing 4 bikes from Australia this year , and my 3rd year transporting a bike to and from Bonneville
For us the 4th bike makes the difference between putting the bikes in crates and including in general freight or using a 6m (20ft) container for only our bikes and gear .
Sharing the fun and the costs helps too , I could not afford to race at Bonneville on my own but sharing the rides with good friends and each contributing what they can makes it happen .