[Zeke]

I think I'd dismount the drums and go over the brakes making sure all the springs are in place and none a broken. Check the thickness of the shoes (obvioulsy) but don't change until needed. Reason being the old shoes have a good arc whereas the new ones probably won't unless a real pro installs them.

Repack bearings and go another few thousand miles. Keep the tire pressures dead on.

Only other "maintenance " I can think of is the lighting. Won't hurt to apply dielectric grease to the lamp bases and make sure no corrosion is occurring which is common for something that sits most of the time.