I used Uship to haul my Skytrak about 300 miles. It worked out fine and I liked the guy. But remember, you are dealing with an individual and his equipment. What he has may or may not be very suitable for what he is attempting to haul. In my case the trailer was designed for hauling keel boats and we had to improvise to get the Skytrak on and secured. It was a bit questionable and took some rigging.
It worked out fine, but if I wasn't there with equipment and knowhow, it never would have worked.
So, be sure whoever you talk to, understands what you want hauled and be sure they have the right equipment. You can talk to several bidders before you decide. Be ready at both ends for loading and unloading, have clear directions or a map available, stand by with your cell phone. Just common sense stuff, I guess.