Dexter axles website has some good videos on servicing the bearings. I would do this before going to the east coast. Although it is not clear if it is necessary. Age, mileage, road conditions all factor in on when to service bearings.
I do mine once a season, I pull the hubs clean bearings check seals and hand pack bearings. I use a infrared temperature gun to monitor the bearings. If I see temps over 150 degrees I will give them a shot of grease. I also have ez lube hubs so that makes it kinda simple. You will have a hard time finding a shop that will "teach" you how to do it.
2016 Ford F250 XLT 4X4 6.2L
2015 Rockwood Signature Ultralite 8329SS
Nights camping in 2016: 19 nights
Miles traveled in 2016: 2,575