How long has it been since this trailer was on the road?
In general, the wheel bearings should be repacked every year or so, if it hasn't been serviced recently that's a first order of business. While the drums are off for that is time to inspect/adjust the brakes. Any trailer shop should be able to do that part.
Odds are good that the axles are in need of replacement, but that doesn't mean it's not possible to tow to Salt Lake City on the existing axles. The ride will be rough in that case, you may have to replace a few rivets when you get it home. This article
will give you a general idea how to determine whether the axle needs to be replaced.
Welcome to the forums, and good luck! There's a wealth of information on here (this very topic has been covered dozens of times, I'm sure.)