I'm on a 900 mile trip to Prescott Arizona. I didn't bring my TD but I did tow a basic utility trailer (15" wheels, 3500lb axle) with a 6x6 ATV on it. About 8 miles from my destination I noticed a wobble in one of my wheels. I immediately pull off the road. The lug nuts are tight but the whole wheel and hub can be rocked. I jack it up and yank off the wheel and hub. The inside bearings gernaded. There were about 6 thing rings but nothing that looks like bearings. It dod gaul the spindle a little but not bad. It also ate the bearing race that presses into the hub. We found replacements at NAPA. The new race fits but didn't need pressing in. I've been driving it and all seams to be fine. I have greased all of the bearings but it has been a couple of years now.
The morral of the story is... At home before a long trip and or once a year take the time, spend the money and grease or have all the wheel bearings greased! Belive me doing it in a dirt parking lot with a store owner yelling at you for being there stinks.
I know that alot of old rear wheel drive cars that have the same type bearings never get repacked and last for ever but trailers need the attention.
Luckly we did find all the parts needed to get back on the road and that everything didn't fail and the wheel fly off.
Pictures to come.