'Arcturus' on Enter the Haggis' Aerials CD instantly comes to mind for fast fiddle play. If you go to ETH's website enterthehaggis.com, I'm fairly sure you can now buy it via a digital download. ETH has several types pf style, so you may want to check out the rest of their catalog.

I'm slightly confused about the evolution of druids from a social class to a religion. Is druidism as a modern religion based on actual historical druids, a separate and higher class of ancient Celtic society? Is neo-druid is a more appropriate title for the present day religion that appears on the dog tag as quoted above?

According to Britannia.com: Although since Christian times Druids have been identified as wizards and soothsayers, in pre-Christian Celtic society they formed an intellectual class comprising philosophers, judges, educators, historians, doctors, seers, astronomers, and astrologers. The earliest surviving Classical references to Druids date to the 2nd century B.C.
The word "Druidae" is of Celtic origin. The Roman writer Pliny the Elder (Gaius Plinius Secundus, 23/24-79 A.D.) believed it to be a cognate with the Greek work "drus," meaning "an oak." "Dru-wid" combines the word roots "oak" and "knowledge" ("wid" means "to know" or "to see" - as in the Sanskrit "vid"). The oak (together with the rowan and hazel) was an important sacred tree to the Druids. In the Celtic social system, Druid was a title given to learned men and women possessing "oak knowledge" (or "oak wisdom").

I've read that the ancient historians were primary sources and stated that druids were a class of well-educated Celtic people, but were not an organized religion. Is the modern DRUID religion an invention inspired by a portion of the historical druid class?

I wouldn't feel too badly about the Anglo-Saxons since they were initially raiders from the West Germanic countries who were then engaged by the Britons to help defend Britons against Picts after Rome withdrew from Britain in 410AD. The Angles, Saxons and Jutes proceeded to war against the Britons and defeated them until they fled into the far western parts of Britain that remain culturally Celtic to this day.

Modern people with primarily ancestral lines originating in the UK are all a mix of Briton/Celt/Anglo/Norman/Norse for a start. I think I could say I have Anglo-Norman-Celt ancestry.

And - William of Normandy was of mixed Norse ancestry, so he really defeated his "cousins" more so than obliterating a unique foreign culture and language (the Danelaw?). Norman French was spoken in England for nearly three hundred more years until the blend into Middle English was begun.

I think some wealthier folks used to send their kids away to boarding or military school. Kinda like an off-site cage? After boarding school, then college and grad school - that all lasts til around 25, right?

Kilts or trews, add a manly mane of long hair and even a redneck wouldn't need a pickup line!