If it's smelling "hot" the bearings may need replacement! Again, not a big deal if the local parts houses have the bearings in stock - along with new seals - and provided the race has not been burned. Any good RV facility should be able to take care of it right away. Also, with reference to "hot," it might be a brake shoe dragging (---disc brakes???) rather than bearings. You said the "inside smelled hot." It could be something altogether different from bearings or brakes - like a hot AC/DC converter or a refrigerator or water heater running on propane.
2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074