Hey there... I hope you don't mind me saying so, but I took your bluegrass trivia quiz, and I am a HUGE LRB fan, and I wanted to point out an error you have there on that question (which has no correct answer listed so unfortunately I tried to guess what you were thinking! lol)  Anyway... here's a snippet of the band bio as posted on CMT, which I'm almost 100% certain is correct:

 The original lineup of the Lonesome River Band was assembled by banjo player-turned-lead vocalist and -rhythm guitarist Tim Austin and featured Steve Thomas on mandolin and fiddle, Rick Williams on banjo, and Jerry McMillan on bass.

Other than that, thanks for the fun quiz and nice to make your acquaintance.... LRB and Blue Highway are also two of my favorites!

~Teri AnnPS stop by and say hi sometime!