I use e tracking my trailer and use ratchet straps to hold things down. I have e track running the full length of the trailer, down each side. I'll use a ratchet strap to hold the walk behind stationary and not "skate" around. I haven't had a problem with the ZTR moving around, but I have straps available if I take a notion to secure it. I also use horizontal and vertical e track on the walls.
I also use Herculiner on the back door ramp and the 1st 18" inside the trailer for traction.