Trampoline training is only really good for learning in air control of the flip/spin. When you're boarding you launch of a ramp and off an edge so you can't replicate that on a tramp. That said it is a huge help. Knowing what you need to do to get that last 15 degrees of rotation to prevent a bail is valuable.
As a trainer I would suggest that you simply learn the tricks yourself and video it. You can then start to dissect the motion to be able to teach others.
2011 Smokin Buck Ferton 155
2013 Flow NX2-SE
2013 Flow Hylite boa
Burton Stagger pants/jacket