Don't be scared. Just be prepared. (sounds like a
slogan doesn't it) Have good tires all the way around
your rig - truck and trailer. That helps a *lot.* Go slow, watch
your speed especially around curves. Keep in mind what you're
pulling.
Relax -- you'll be FINE -- I'm hoping to be at
Wickenburg, too, maybe with my new horse, so will look for you there!
Where will you be coming from?