cobra wheel bearings and brakes

I know this has come up in the past, but i'm having trouble finding the previous posts.
I recently bought a Carat in a 2005 Cobra trailer and had it hauled from the west coast to here in Georgia on a flat bed. When i started pulling the trailer, the hubs started getting hot within 12 miles, the right side more than the left. The brake assembly housing got, if anything, hotter than the hub. I assume the grease has dried out of the sealed wheel bearings. I jacked the trailer up and the wheels turn freely without wobble, but make a rubbing sound. Also the brakes squeal when braking. I tried to determine whether the brake drums might be dragging, The cables seem to fully release when the brake lever releases (though i don't know how to check if a brake return spring has failed).

What's the best source of wheel bearings (and brake parts if needed)? Any suggestions for further diagnosis?

thanks,

Key