Ask around for a good shop to do your brake inspection and repacking. There are shops that specialize in service for trailers and that can be one venue. Folks have complaints about the big box RV service shops, but it ALL depends on the experience and good service of the person doing the work. Local independent garage mechanics can do excellent work.
And consider replacing that tire.
This type of service ain't rocket science. There should be plenty of shops able to do a good job.
Research it too. Dexter has online info and you can provide a shop with a copy of their service procedures and specifications.
And have a swell trip out West.