Wrap it tightly with some wrap plastic, then you might wish to wrap that with some duck tape..That keeps dust out and any fall-off parts intact.
Good to have some jack stands so you might control the trailer tilting. Good to have a boat winch clamped on so you might pinch it off with not letting it slide. I dropped a SG when my winch missed catching and that fall broke the oiler.
Shame on me doing that alone.
Most likely it will try to slide and tip forward at breaking. If you slam your breaks you can break a rope or a strap so extra to that direction.. and a tight curve at 70, do not.
Take care to not strap or rope over a sharp edge, to some ropes a 1/8 radius is the same as a sharp edge.
If you have not started it, then hand turn the spindle a number of times, this will loosen the dead cats the somehow build inside a spindle.
Be sure your trailer tires are up to listed pressure.
I used to tell a new guy Think you have a hot coffee on the dash and you don't want to tip it.