Robert J,
Regarding your statement:
"Pharisaic leaders likely endured extensive Pharisaic education and initiation, but many others, like the young Paul and Josephus, probably just preferred the Pharisaic oral traditions and on-going interpretation of the Mosaic laws and followed, to varying degrees, the Pharisaic standards for tithing and table rituals. Would that make them Pharisees? Hard to know absent knowledge of first-century protocols on the subject. "
I get the impression that Paul and Josephus were Pharisees. Let's consider Paul first.
While Paul only applies the word "Pharisee" to himself in Php. 3:5 ("in regard to the law, a Pharisee"), and perhaps this may only mean that he "just preferred the Pharisaic oral traditions" (etc.), in Gal. 1:14 he says he was "advancing in Judaism beyond many of my own age among my people and was extremely zealous for the traditions of my fathers."
"The traditions of my fathers" is arguably a reference to the Pharisaic oral traditions (and more than just just preferring them, he says he was "extremely zealous for them").
When describing the Pharisees in Ant. 13.10.6, not only does Josephus say that they "delivered to the people a great many observances by succession from their fathers, which are not written in the laws of Moses," but also that the Sadducees "reject them, and say that we ... are not to observe what are derived from the tradition of our forefathers."
If Acts it not historically accurate, its author at least thought that Paul was a Pharisee (23:6, 26:5) and associates this expression with the Pharisees: "I studied under Gamaliel [a Pharisee, Acts 5:34] and was thoroughly trained in the law of our fathers" (22:3).
Even one of the tractates of the Mishnah is called "our fathers":
http://en.wikipedia.org/wiki/Pirkei_Avot
Concerning Alexandra Salome, who was influenced by the Pharisees, Josephus says that "she restored again those practices which the Pharisees had introduced, according to the traditions of their forefathers, and which her father-in-law, Hyrcanus, had abrogated" (Ant. 13.16.2).
One of the issues Josephus had with the Fourth Philosphy (which he says in Ant. 18.1.6 otherwise "agree in all other things with the Pharisaic notions" and whose founder was a Pharisee) was that they had "altered the customs of our fathers" (Ant. 18.1.1).
Mark 7:5 says "The Pharisees and the teachers of the law asked Jesus, 'Why don't your disciples live according to the tradition of the elders instead of eating their food with defiled hands?'"
So not all Jews observed the "traditions of our fathers" that Paul says was he had been "extremely zealous for." So to me, since he talked and walked like a Pharisee, he was more likely than not a Pharisee.
I see your objection to Josephus being a Pharisee in a similar light. Since he was writing for Romans, he presents all the Jewish sects as philosphies. And in Life 2 he says, "I had a mind to make trim of the several sects that were among us ... I thought that by this means I might choose the best, if I were once acquainted with them all ... So when I had accomplished my desires, I ... began to conduct myself according to the rules of the sect of the Pharisees."
So not only was he well acquainted with the Pharisees, when he officiated as a priest in the temple he says "I abode among the high priests and the chief of the Pharisees" (Life 5). And again, one of his issues with the Fourth Philosophy was that they had altered "the customs of our fathers" (Ant. 18.1.1). So he also at least walked and talked like a Pharisee.
You know in spite of all you gained, you still have to stand out in the pouring rain.