[Daryles]

If you cannot do it yourself (many YouTube videos, Dexter also has a video on how to do it) I would check with a local garage. Last time I was at CW Springfield MO it's pretty tight. Maybe call them first to see how long it would be to get in. Verify exactly what they will do (pull drums, inspect brakes, clean inspect bearing/races, pack bearings, reassemble, adjust brakes, inspect/grease suspension).
Rather than just pump grease into the hub zirc.
Also verify what grease they are using. Must be on Dexter approved list.
I believe the Dexter Axle Manual is in the files section. It has everything in it.