Hey Jim. Sure, all of this is home mechanic stuff. You need space to park and work, Jack and jackstands. When you jack up the trailer using the jacking point ( check your manual ) the 2 wheels will raise off the ground. So to make life easy plan to do 2 wheels on the same side at the same time. If doing it based on regular maintenance plan on replacing the seals and packing the bearings. Other jobs may arise as you inspect during the job. So be a good boy scout and get the seals ahead of time. There is a nice tool shown earlier on this thread for packing the bearings. It works great and will work for most all car and light truck front wheel bearings that are meant to be re-packed. Many newer vehicles have a sealed bearing that is not meant to be removed and re-packed. But you don't need the special tool. You can clean the bearings using a solvent and pack the grease using your hands just as well. Just not as fast. Re-assemble using your new seals and tighten as directed and you're good to go for a test spin. Check the hubs with your hand after a few miles. They may be warm but never should be too hot to touch. That's a symptom of the hub nut being too tight or the brakes dragging.
Sorry to ramble. The point is, this is a basic job and well within the average mechanical skills. No special tools required. Just stuff we all probably carry with us on every trip. Plenty of help here on the forum to answer any question that arise.
Good luck, go for it.