When where the bearings packed last? If you don't know then its probably best to get them packed so you know there good to go and then if you continue to tow it just a few miles a year you will be good for a lot of years. There is really no way to tell if the bearings are bad until they cause major problems. I say spend the $300 for piece of mind instead of $3000 for new axles. They might have the original factory back job from 2003.
2015 Eclipse Iconic Toy Hauler made by Eclipse Manufacturing which is a pile of junk. If you want to know more just ask and I'll tell you about cracked frames, loose tin, walls falling off, bad holding tanks and very poor customer service.