Grease on hub inside parking brake drum.

Light coating of grease inside the drum / hub. Its not splattered around inside the hub, on the pads, or anywhere else. Just sitting on the spots in the photo, mostly on the top of the hub. The wheel has no play. Am i looking at replacing a wheel bearing?

I would check the differential/ rear end oil level for loss as well as the brake fluid level.
Definitely needs a mechanics opinion though

its not brake fluid. there is nothing on the caliper, and the res is always at the same level.

You know I haven't checked the installation procedure yet, but as far as I know the bearings are not greased, they are lubed by the diff oil in the rear axle tube. If your grease is actually gear oil mixed with dirt it may be that it is only the oil seal that has failed (possibly due to blocked breather causing axle to pressurize). If so you will need to remove the half shafts and take the bearings off to get to the seals (Aqua Puttana did a pretty good write up on this in the T1N section).

First though I would check carefully and see if someone has just selectively greased the contact points between the shoes and the backplate - I normally use a little smear of copper grease for this but maybe someone used some other kind of grease?