$700 for what? I think you got ripped off. All new backing plates with shoes and magnets are $200 USD for all 4. New seals are $10 USD all 4. Prices from Etrailer.com where I purchased all my parts a couple of months ago. Only a few cans of brake clean are needed to clean the drum. I know things are a bit more expensive in Canada but that's way high. You can treat EZ-Lube axles just like standard axles. Don't let anyone pump grease into them. I think its a colossal waste of grease anyway because you have to fill up the entire cavity between the bearings. Here's to hoping you have better luck in the future with your camper. Problems like that are NO FUN especially when you expect someone to be doing a proper job.