for a enclosed trailer strap the stand to the wall or doors, , if the trailer is tall enough stand the kart on end strap it to the wall. or use a stand like this Streeter Two Level Kart Stand, and put the kart stand on top or the stacker . http://www.cometkartsales.com/store/chassis/cpa/images/sks-doublestacker.jpg
You can either buy a stacker or make one yourself.
I would not travel with the kart on a regular kart stand , they can collapse.
I installed eye bolts and use good ratchet straps, not the cheap ones either, i want my kart to stay in place if I have to stop quickly..