If your near a Harbor Freight their jack stands are reasonably priced, I bought two and jacked once side at a time and also used the two pneumatic jacks along with blocking the side I was working on. By the way the truck was also hitched to the trailer. It doesn't hurt to be overly cautious.
I removed the bearings on mine at about 12K, cleaned examined the bearings, which were in good shape, and repacked, replaced the seals, cleaned my self adjusting brakes by lightly sanding the drums and pad with a very very fine sandpaper and sprayed with a brake cleaner and made sure everything worked. Our traveling is done on major highways so not alot of start and stopping everything looked really good. As everything gets older I might do it every two years, but I definitely will check suspension components every year or more.