Tell me about it, I almost had a tire fly off on the fwy due to cooked bearings that had gotten washed out the week before. However, this was just because it was the first time I didn't check them after a water crossing. Shows you that maintenance is key! If I would have taken off the dust seals and lightly greased the outside of the bearings and resealed them, it shouldn't have been a problem. I wouldn'tve even needed to lift the truck or take off the tire!
Though I know 2wd and 4wd front hubs are different.