Securing a motorcycle on a train, boat or trailer is no problem if you have a set of good straps.
The usual ratchet straps are a prerequisite, but there are also some very handy attachments. A handlebar tie-down harness or set of loops create extra attachment points on your bike. You attach the straps to these points, without the risk of damaging the paintwork. A TyreFix helps to secure the rear wheel, while a wheel clamp can be used at the front.
If you don't have well placed fixing points in the van or on the trailer, don't take any risks and invest (limited) in a tie-down rail set.
It may lead to less disappointment at the end of a long journey.