I use Bulldog Winch Ratcheting Wheel Tie-Down Straps - Extra-Wide Tire - Vertical Mount - 3,335 lbs. You can two tie downs on opposing tires (i.e. left front and right rear) however I do all four. Keeps the rig solid on the trailer and does not use the suspension.
Rhino USA $59 from Amazon. I used this type of tie down with several UTVs for thousands of miles, including off-road in Moab and Arizona without any issues.
I use Rhino ratcheting tire straps on mine inside my toy hauler. My floor has L track strips front to back in 3 rows. I just bought the L track moveable anchor points and strap it down using the tires as my anchor points.