Canyon dancers (or their generic counterpart) are required on some bikes. Sometimes you cannot get a streight shot from the clip ons to the tie down points, the fairings get in the way. Canyon dancers are the solution.
If you can get a streight shot, dont worry about it.
When you got the forks compressed the entire weight of your bike will be on the front wheel. You can move the rear wheel from side to side with you hand (And you may have to, in order to close the tailgate)
Anyways, there is virtually no way the front wheel can go anywhere if you did this right.
Oh, and you need a ramp!