No its not hard to do, worth having the bearings as well in case they are FUBAR. Take careful note of the way the seals are set in the hub so you get them back in the right way.
Jack wheel, chock one other and remove wheel, that should also prevent any oil loss from the axle.
Remove the six nuts around the hub and remove the shaft.
Undo the brake caliper and tie out the way (dont undo the brake pipes, just remove the caliper)
Use hub nut socket to remove large nut, and the tab washer, then the other nut and spacer, then pull hub off and take to bench.
change the seals and rebuild the same way, if the bearings are ok then just regrease them. HTH?