I greatly appreciate all the help!
To answer Jim's questions:
I have been taking the battery to AutoZone (close to the house) and have had them charge and check the battery.
Yes, the brake wear light as well as the fuel low light are not coming on but the others are. (I will pull the cluster and check the bulbs to be sure)
With the charged battery the glow plug indicator lights up properly.
The charge indicator light does not come on with a fully charged battery.
The battery holds constant voltage (engine not running) when the alternator is disconnected but is slowly losing voltage since I reconnected the alternator (engine not running).
[loss of voltage while connected equals bad alternator or internals, correct?]
My local guy was describing the probability of the regulator being the issue but is suggesting replacing the whole alternator due to age (almost 5 years, 30,000miles) on a reman.'d Bosch. What do you think?

I will check the voltage while the engine is running in the meantime, and please let me know if you have any other thoughts!