On a wood deck trailer I like to build a ''picture'' frame around the base of the machine or skids to keep it from sliding. Use heavy deck screws to secure. The real danger is the idiot that stops right in front of you when you are driving. You are not going to accelerate out from under the machine, but breaking is the real problem. Leave a lot of extra stopping distance.
Lag screwing the machine to skids is my preferred method.
Using a metal deck trailer, I secure the base as shown in the pictures below. I'm using chains, but heavy straps will work also.
Then I try to grab something up high on the machine, in the case of the VM16 the column looks like it's accessible, and looks like it has enough clearance for straps without killing any enclosure pieces.
Depending on how substantial the enclosure is, you might be able to strap across it also. When I transported my lathe, the chains were attached to the jack screw feet.
Then a couple of 3 inch straps right over the enclosure.
It didn't even move at all in on a 1700 mile trip, even survived one panic stop in heavy traffic.